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Finding the Fourth Proportional to 92,788.48, 139,007.76 and 71,909.92

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Solution

The fourth proportional to 92,788.48, 139,007.76 and 71,909.92 is: 107,729.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,788.48 : 139,007.76 = 71,909.92 : x
  2. Step 2: Convert to fraction form
    92,788.48/139,007.76 = 71,909.92/x
  3. Step 3: Cross multiply
    92,788.48x = 139,007.76 × 71,909.92
  4. Step 4: Simplify right side
    92,788.48x = 9,996,036,900.98
  5. Step 5: Solve for x
    x = 9,996,036,900.98/92,788.48
  6. Step 6: Final answer
    x = 107,729.29

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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.