Home / 138,258.30-207,385.68-75,478.38

Finding the Fourth Proportional to 138,258.30, 207,385.68 and 75,478.38

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Solution

The fourth proportional to 138,258.30, 207,385.68 and 75,478.38 is: 113,216.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,258.30 : 207,385.68 = 75,478.38 : x
  2. Step 2: Convert to fraction form
    138,258.30/207,385.68 = 75,478.38/x
  3. Step 3: Cross multiply
    138,258.30x = 207,385.68 × 75,478.38
  4. Step 4: Simplify right side
    138,258.30x = 15,653,135,161.60
  5. Step 5: Solve for x
    x = 15,653,135,161.60/138,258.30
  6. Step 6: Final answer
    x = 113,216.60

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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.