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Finding the Fourth Proportional to 71,687.91, 107,386.07 and 36,127.29

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Solution

The fourth proportional to 71,687.91, 107,386.07 and 36,127.29 is: 54,117.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,687.91 : 107,386.07 = 36,127.29 : x
  2. Step 2: Convert to fraction form
    71,687.91/107,386.07 = 36,127.29/x
  3. Step 3: Cross multiply
    71,687.91x = 107,386.07 × 36,127.29
  4. Step 4: Simplify right side
    71,687.91x = 3,879,567,512.21
  5. Step 5: Solve for x
    x = 3,879,567,512.21/71,687.91
  6. Step 6: Final answer
    x = 54,117.46

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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.