Home / 138,665.20-207,931.92-68,462.52

Finding the Fourth Proportional to 138,665.20, 207,931.92 and 68,462.52

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Solution

The fourth proportional to 138,665.20, 207,931.92 and 68,462.52 is: 102,661.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,665.20 : 207,931.92 = 68,462.52 : x
  2. Step 2: Convert to fraction form
    138,665.20/207,931.92 = 68,462.52/x
  3. Step 3: Cross multiply
    138,665.20x = 207,931.92 × 68,462.52
  4. Step 4: Simplify right side
    138,665.20x = 14,235,543,231.64
  5. Step 5: Solve for x
    x = 14,235,543,231.64/138,665.20
  6. Step 6: Final answer
    x = 102,661.25

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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.