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Finding the Fourth Proportional to 138,545.01, 207,895.37 and 75,369.55

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Solution

The fourth proportional to 138,545.01, 207,895.37 and 75,369.55 is: 113,096.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,545.01 : 207,895.37 = 75,369.55 : x
  2. Step 2: Convert to fraction form
    138,545.01/207,895.37 = 75,369.55/x
  3. Step 3: Cross multiply
    138,545.01x = 207,895.37 × 75,369.55
  4. Step 4: Simplify right side
    138,545.01x = 15,668,980,107.14
  5. Step 5: Solve for x
    x = 15,668,980,107.14/138,545.01
  6. Step 6: Final answer
    x = 113,096.68

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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.