Home / 87,513.60-131,428.80-76,627.20

Finding the Fourth Proportional to 87,513.60, 131,428.80 and 76,627.20

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Solution

The fourth proportional to 87,513.60, 131,428.80 and 76,627.20 is: 115,079.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,513.60 : 131,428.80 = 76,627.20 : x
  2. Step 2: Convert to fraction form
    87,513.60/131,428.80 = 76,627.20/x
  3. Step 3: Cross multiply
    87,513.60x = 131,428.80 × 76,627.20
  4. Step 4: Simplify right side
    87,513.60x = 10,071,020,943.36
  5. Step 5: Solve for x
    x = 10,071,020,943.36/87,513.60
  6. Step 6: Final answer
    x = 115,079.50

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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.