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Finding the Fourth Proportional to 71,644.88, 107,550.34 and 38,429.82

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Solution

The fourth proportional to 71,644.88, 107,550.34 and 38,429.82 is: 57,689.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,644.88 : 107,550.34 = 38,429.82 : x
  2. Step 2: Convert to fraction form
    71,644.88/107,550.34 = 38,429.82/x
  3. Step 3: Cross multiply
    71,644.88x = 107,550.34 × 38,429.82
  4. Step 4: Simplify right side
    71,644.88x = 4,133,140,207.14
  5. Step 5: Solve for x
    x = 4,133,140,207.14/71,644.88
  6. Step 6: Final answer
    x = 57,689.26

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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.