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Finding the Fourth Proportional to 71,294.80, 106,934 and 18,708.39

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Solution

The fourth proportional to 71,294.80, 106,934 and 18,708.39 is: 28,060.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,294.80 : 106,934 = 18,708.39 : x
  2. Step 2: Convert to fraction form
    71,294.80/106,934 = 18,708.39/x
  3. Step 3: Cross multiply
    71,294.80x = 106,934 × 18,708.39
  4. Step 4: Simplify right side
    71,294.80x = 2,000,562,976.26
  5. Step 5: Solve for x
    x = 2,000,562,976.26/71,294.80
  6. Step 6: Final answer
    x = 28,060.43

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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.