Home / 86,608,334.25-129,912,668.60-21,029,195.57

Finding the Fourth Proportional to 86,608,334.25, 129,912,668.60 and 21,029,195.57

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Solution

The fourth proportional to 86,608,334.25, 129,912,668.60 and 21,029,195.57 is: 31,543,833.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,608,334.25 : 129,912,668.60 = 21,029,195.57 : x
  2. Step 2: Convert to fraction form
    86,608,334.25/129,912,668.60 = 21,029,195.57/x
  3. Step 3: Cross multiply
    86,608,334.25x = 129,912,668.60 × 21,029,195.57
  4. Step 4: Simplify right side
    86,608,334.25x = 2,731,958,914,255,289
  5. Step 5: Solve for x
    x = 2,731,958,914,255,289/86,608,334.25
  6. Step 6: Final answer
    x = 31,543,833.95

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.