Home / 83,139.20-124,708.80-72,313.55

Finding the Fourth Proportional to 83,139.20, 124,708.80 and 72,313.55

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Solution

The fourth proportional to 83,139.20, 124,708.80 and 72,313.55 is: 108,470.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,139.20 : 124,708.80 = 72,313.55 : x
  2. Step 2: Convert to fraction form
    83,139.20/124,708.80 = 72,313.55/x
  3. Step 3: Cross multiply
    83,139.20x = 124,708.80 × 72,313.55
  4. Step 4: Simplify right side
    83,139.20x = 9,018,136,044.24
  5. Step 5: Solve for x
    x = 9,018,136,044.24/83,139.20
  6. Step 6: Final answer
    x = 108,470.33

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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.