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Finding the Fourth Proportional to 71,130.78, 106,614.09 and 26,729.15

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Solution

The fourth proportional to 71,130.78, 106,614.09 and 26,729.15 is: 40,062.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,130.78 : 106,614.09 = 26,729.15 : x
  2. Step 2: Convert to fraction form
    71,130.78/106,614.09 = 26,729.15/x
  3. Step 3: Cross multiply
    71,130.78x = 106,614.09 × 26,729.15
  4. Step 4: Simplify right side
    71,130.78x = 2,849,703,470.65
  5. Step 5: Solve for x
    x = 2,849,703,470.65/71,130.78
  6. Step 6: Final answer
    x = 40,062.87

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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.