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Finding the Fourth Proportional to 99,711.91, 137,605.03 and 54,390.66

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Solution

The fourth proportional to 99,711.91, 137,605.03 and 54,390.66 is: 75,060.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,711.91 : 137,605.03 = 54,390.66 : x
  2. Step 2: Convert to fraction form
    99,711.91/137,605.03 = 54,390.66/x
  3. Step 3: Cross multiply
    99,711.91x = 137,605.03 × 54,390.66
  4. Step 4: Simplify right side
    99,711.91x = 7,484,427,749.02
  5. Step 5: Solve for x
    x = 7,484,427,749.02/99,711.91
  6. Step 6: Final answer
    x = 75,060.52

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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.