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Finding the Fourth Proportional to 198,351.74, 297,645.84 and 72,001.87

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Solution

The fourth proportional to 198,351.74, 297,645.84 and 72,001.87 is: 108,045.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,351.74 : 297,645.84 = 72,001.87 : x
  2. Step 2: Convert to fraction form
    198,351.74/297,645.84 = 72,001.87/x
  3. Step 3: Cross multiply
    198,351.74x = 297,645.84 × 72,001.87
  4. Step 4: Simplify right side
    198,351.74x = 21,431,056,333.61
  5. Step 5: Solve for x
    x = 21,431,056,333.61/198,351.74
  6. Step 6: Final answer
    x = 108,045.72

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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.