Home / 138,109.46-207,141.12-38,279.75

Finding the Fourth Proportional to 138,109.46, 207,141.12 and 38,279.75

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Solution

The fourth proportional to 138,109.46, 207,141.12 and 38,279.75 is: 57,413.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,109.46 : 207,141.12 = 38,279.75 : x
  2. Step 2: Convert to fraction form
    138,109.46/207,141.12 = 38,279.75/x
  3. Step 3: Cross multiply
    138,109.46x = 207,141.12 × 38,279.75
  4. Step 4: Simplify right side
    138,109.46x = 7,929,310,288.32
  5. Step 5: Solve for x
    x = 7,929,310,288.32/138,109.46
  6. Step 6: Final answer
    x = 57,413.23

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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.