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Finding the Fourth Proportional to 99,807.92, 137,734.92 and 57,374.72

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Solution

The fourth proportional to 99,807.92, 137,734.92 and 57,374.72 is: 79,177.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,807.92 : 137,734.92 = 57,374.72 : x
  2. Step 2: Convert to fraction form
    99,807.92/137,734.92 = 57,374.72/x
  3. Step 3: Cross multiply
    99,807.92x = 137,734.92 × 57,374.72
  4. Step 4: Simplify right side
    99,807.92x = 7,902,502,469.22
  5. Step 5: Solve for x
    x = 7,902,502,469.22/99,807.92
  6. Step 6: Final answer
    x = 79,177.11

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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.