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Finding the Fourth Proportional to 99,479.91, 137,280.92 and 54,158.28

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Solution

The fourth proportional to 99,479.91, 137,280.92 and 54,158.28 is: 74,737.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,479.91 : 137,280.92 = 54,158.28 : x
  2. Step 2: Convert to fraction form
    99,479.91/137,280.92 = 54,158.28/x
  3. Step 3: Cross multiply
    99,479.91x = 137,280.92 × 54,158.28
  4. Step 4: Simplify right side
    99,479.91x = 7,434,898,233.23
  5. Step 5: Solve for x
    x = 7,434,898,233.23/99,479.91
  6. Step 6: Final answer
    x = 74,737.69

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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.