Home / 138,288.18-207,422.49-78,937.86

Finding the Fourth Proportional to 138,288.18, 207,422.49 and 78,937.86

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Solution

The fourth proportional to 138,288.18, 207,422.49 and 78,937.86 is: 118,401.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,288.18 : 207,422.49 = 78,937.86 : x
  2. Step 2: Convert to fraction form
    138,288.18/207,422.49 = 78,937.86/x
  3. Step 3: Cross multiply
    138,288.18x = 207,422.49 × 78,937.86
  4. Step 4: Simplify right side
    138,288.18x = 16,373,487,476.47
  5. Step 5: Solve for x
    x = 16,373,487,476.47/138,288.18
  6. Step 6: Final answer
    x = 118,401.21

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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.