Home / 138,540.93-207,736.86-71,815.65

Finding the Fourth Proportional to 138,540.93, 207,736.86 and 71,815.65

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Solution

The fourth proportional to 138,540.93, 207,736.86 and 71,815.65 is: 107,684.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,540.93 : 207,736.86 = 71,815.65 : x
  2. Step 2: Convert to fraction form
    138,540.93/207,736.86 = 71,815.65/x
  3. Step 3: Cross multiply
    138,540.93x = 207,736.86 × 71,815.65
  4. Step 4: Simplify right side
    138,540.93x = 14,918,757,629.86
  5. Step 5: Solve for x
    x = 14,918,757,629.86/138,540.93
  6. Step 6: Final answer
    x = 107,684.84

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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.