Home / 87,640.40-131,470.20-84,875.60

Finding the Fourth Proportional to 87,640.40, 131,470.20 and 84,875.60

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Solution

The fourth proportional to 87,640.40, 131,470.20 and 84,875.60 is: 127,322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,640.40 : 131,470.20 = 84,875.60 : x
  2. Step 2: Convert to fraction form
    87,640.40/131,470.20 = 84,875.60/x
  3. Step 3: Cross multiply
    87,640.40x = 131,470.20 × 84,875.60
  4. Step 4: Simplify right side
    87,640.40x = 11,158,612,107.12
  5. Step 5: Solve for x
    x = 11,158,612,107.12/87,640.40
  6. Step 6: Final answer
    x = 127,322.70

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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.