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Finding the Fourth Proportional to 138,608.76, 207,740.88 and 63,649.38

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Solution

The fourth proportional to 138,608.76, 207,740.88 and 63,649.38 is: 95,394.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,608.76 : 207,740.88 = 63,649.38 : x
  2. Step 2: Convert to fraction form
    138,608.76/207,740.88 = 63,649.38/x
  3. Step 3: Cross multiply
    138,608.76x = 207,740.88 × 63,649.38
  4. Step 4: Simplify right side
    138,608.76x = 13,222,578,212.65
  5. Step 5: Solve for x
    x = 13,222,578,212.65/138,608.76
  6. Step 6: Final answer
    x = 95,394.97

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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.