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Finding the Fourth Proportional to 99,788.91, 137,660.94 and 67,534.80

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Solution

The fourth proportional to 99,788.91, 137,660.94 and 67,534.80 is: 93,165.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,788.91 : 137,660.94 = 67,534.80 : x
  2. Step 2: Convert to fraction form
    99,788.91/137,660.94 = 67,534.80/x
  3. Step 3: Cross multiply
    99,788.91x = 137,660.94 × 67,534.80
  4. Step 4: Simplify right side
    99,788.91x = 9,296,904,050.71
  5. Step 5: Solve for x
    x = 9,296,904,050.71/99,788.91
  6. Step 6: Final answer
    x = 93,165.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.