Home / 87,505.20-130,966.20-77,007.60

Finding the Fourth Proportional to 87,505.20, 130,966.20 and 77,007.60

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Solution

The fourth proportional to 87,505.20, 130,966.20 and 77,007.60 is: 115,254.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,505.20 : 130,966.20 = 77,007.60 : x
  2. Step 2: Convert to fraction form
    87,505.20/130,966.20 = 77,007.60/x
  3. Step 3: Cross multiply
    87,505.20x = 130,966.20 × 77,007.60
  4. Step 4: Simplify right side
    87,505.20x = 10,085,392,743.12
  5. Step 5: Solve for x
    x = 10,085,392,743.12/87,505.20
  6. Step 6: Final answer
    x = 115,254.78

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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.