Home / 138,323.10-207,456.30-38,458.20

Finding the Fourth Proportional to 138,323.10, 207,456.30 and 38,458.20

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Solution

The fourth proportional to 138,323.10, 207,456.30 and 38,458.20 is: 57,679.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,323.10 : 207,456.30 = 38,458.20 : x
  2. Step 2: Convert to fraction form
    138,323.10/207,456.30 = 38,458.20/x
  3. Step 3: Cross multiply
    138,323.10x = 207,456.30 × 38,458.20
  4. Step 4: Simplify right side
    138,323.10x = 7,978,395,876.66
  5. Step 5: Solve for x
    x = 7,978,395,876.66/138,323.10
  6. Step 6: Final answer
    x = 57,679.42

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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.