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Finding the Fourth Proportional to 138,477.80, 207,279.30 and 108,734.60

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Solution

The fourth proportional to 138,477.80, 207,279.30 and 108,734.60 is: 162,758.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,477.80 : 207,279.30 = 108,734.60 : x
  2. Step 2: Convert to fraction form
    138,477.80/207,279.30 = 108,734.60/x
  3. Step 3: Cross multiply
    138,477.80x = 207,279.30 × 108,734.60
  4. Step 4: Simplify right side
    138,477.80x = 22,538,431,773.78
  5. Step 5: Solve for x
    x = 22,538,431,773.78/138,477.80
  6. Step 6: Final answer
    x = 162,758.45

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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.