Home / 138,003.12-206,952.14-90,605.54

Finding the Fourth Proportional to 138,003.12, 206,952.14 and 90,605.54

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Solution

The fourth proportional to 138,003.12, 206,952.14 and 90,605.54 is: 135,873.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,003.12 : 206,952.14 = 90,605.54 : x
  2. Step 2: Convert to fraction form
    138,003.12/206,952.14 = 90,605.54/x
  3. Step 3: Cross multiply
    138,003.12x = 206,952.14 × 90,605.54
  4. Step 4: Simplify right side
    138,003.12x = 18,751,010,398.86
  5. Step 5: Solve for x
    x = 18,751,010,398.86/138,003.12
  6. Step 6: Final answer
    x = 135,873.82

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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.