Home / 86,117.40-129,176.10-79,896.60

Finding the Fourth Proportional to 86,117.40, 129,176.10 and 79,896.60

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Solution

The fourth proportional to 86,117.40, 129,176.10 and 79,896.60 is: 119,844.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,117.40 : 129,176.10 = 79,896.60 : x
  2. Step 2: Convert to fraction form
    86,117.40/129,176.10 = 79,896.60/x
  3. Step 3: Cross multiply
    86,117.40x = 129,176.10 × 79,896.60
  4. Step 4: Simplify right side
    86,117.40x = 10,320,731,191.26
  5. Step 5: Solve for x
    x = 10,320,731,191.26/86,117.40
  6. Step 6: Final answer
    x = 119,844.90

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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.