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Finding the Fourth Proportional to 247,903.31, 371,907.21 and 129,542.87

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Solution

The fourth proportional to 247,903.31, 371,907.21 and 129,542.87 is: 194,341.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,903.31 : 371,907.21 = 129,542.87 : x
  2. Step 2: Convert to fraction form
    247,903.31/371,907.21 = 129,542.87/x
  3. Step 3: Cross multiply
    247,903.31x = 371,907.21 × 129,542.87
  4. Step 4: Simplify right side
    247,903.31x = 48,177,927,357.09
  5. Step 5: Solve for x
    x = 48,177,927,357.09/247,903.31
  6. Step 6: Final answer
    x = 194,341.61

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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.