Home / 72,689.28-100,306.02-40,862.94

Finding the Fourth Proportional to 72,689.28, 100,306.02 and 40,862.94

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Solution

The fourth proportional to 72,689.28, 100,306.02 and 40,862.94 is: 56,387.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,689.28 : 100,306.02 = 40,862.94 : x
  2. Step 2: Convert to fraction form
    72,689.28/100,306.02 = 40,862.94/x
  3. Step 3: Cross multiply
    72,689.28x = 100,306.02 × 40,862.94
  4. Step 4: Simplify right side
    72,689.28x = 4,098,798,876.90
  5. Step 5: Solve for x
    x = 4,098,798,876.90/72,689.28
  6. Step 6: Final answer
    x = 56,387.94

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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.