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Finding the Fourth Proportional to 247,904.31, 371,908.71 and 129,543.87

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Solution

The fourth proportional to 247,904.31, 371,908.71 and 129,543.87 is: 194,343.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,904.31 : 371,908.71 = 129,543.87 : x
  2. Step 2: Convert to fraction form
    247,904.31/371,908.71 = 129,543.87/x
  3. Step 3: Cross multiply
    247,904.31x = 371,908.71 × 129,543.87
  4. Step 4: Simplify right side
    247,904.31x = 48,178,493,580.11
  5. Step 5: Solve for x
    x = 48,178,493,580.11/247,904.31
  6. Step 6: Final answer
    x = 194,343.11

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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.