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Finding the Fourth Proportional to 73,689.80, 101,691.90 and 40,155.80

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Solution

The fourth proportional to 73,689.80, 101,691.90 and 40,155.80 is: 55,414.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,689.80 : 101,691.90 = 40,155.80 : x
  2. Step 2: Convert to fraction form
    73,689.80/101,691.90 = 40,155.80/x
  3. Step 3: Cross multiply
    73,689.80x = 101,691.90 × 40,155.80
  4. Step 4: Simplify right side
    73,689.80x = 4,083,519,598.02
  5. Step 5: Solve for x
    x = 4,083,519,598.02/73,689.80
  6. Step 6: Final answer
    x = 55,414.99

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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.