Home / 100,545.90-138,753.66-54,605.70

Finding the Fourth Proportional to 100,545.90, 138,753.66 and 54,605.70

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Solution

The fourth proportional to 100,545.90, 138,753.66 and 54,605.70 is: 75,356.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,545.90 : 138,753.66 = 54,605.70 : x
  2. Step 2: Convert to fraction form
    100,545.90/138,753.66 = 54,605.70/x
  3. Step 3: Cross multiply
    100,545.90x = 138,753.66 × 54,605.70
  4. Step 4: Simplify right side
    100,545.90x = 7,576,740,731.86
  5. Step 5: Solve for x
    x = 7,576,740,731.86/100,545.90
  6. Step 6: Final answer
    x = 75,356.04

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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.