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Finding the Fourth Proportional to 198,990.61, 274,612.28 and 108,350.39

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Solution

The fourth proportional to 198,990.61, 274,612.28 and 108,350.39 is: 149,526.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,990.61 : 274,612.28 = 108,350.39 : x
  2. Step 2: Convert to fraction form
    198,990.61/274,612.28 = 108,350.39/x
  3. Step 3: Cross multiply
    198,990.61x = 274,612.28 × 108,350.39
  4. Step 4: Simplify right side
    198,990.61x = 29,754,347,781.57
  5. Step 5: Solve for x
    x = 29,754,347,781.57/198,990.61
  6. Step 6: Final answer
    x = 149,526.39

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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.