Home / 128,331.90-177,098.43-71,743.28

Finding the Fourth Proportional to 128,331.90, 177,098.43 and 71,743.28

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Solution

The fourth proportional to 128,331.90, 177,098.43 and 71,743.28 is: 99,005.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,331.90 : 177,098.43 = 71,743.28 : x
  2. Step 2: Convert to fraction form
    128,331.90/177,098.43 = 71,743.28/x
  3. Step 3: Cross multiply
    128,331.90x = 177,098.43 × 71,743.28
  4. Step 4: Simplify right side
    128,331.90x = 12,705,621,365.56
  5. Step 5: Solve for x
    x = 12,705,621,365.56/128,331.90
  6. Step 6: Final answer
    x = 99,005.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.