Home / 138,439.12-207,658.68-79,233.52

Finding the Fourth Proportional to 138,439.12, 207,658.68 and 79,233.52

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Solution

The fourth proportional to 138,439.12, 207,658.68 and 79,233.52 is: 118,850.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,439.12 : 207,658.68 = 79,233.52 : x
  2. Step 2: Convert to fraction form
    138,439.12/207,658.68 = 79,233.52/x
  3. Step 3: Cross multiply
    138,439.12x = 207,658.68 × 79,233.52
  4. Step 4: Simplify right side
    138,439.12x = 16,453,528,174.95
  5. Step 5: Solve for x
    x = 16,453,528,174.95/138,439.12
  6. Step 6: Final answer
    x = 118,850.28

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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.