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Finding the Fourth Proportional to 138,034.60, 207,051.90 and 123,600.40

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Solution

The fourth proportional to 138,034.60, 207,051.90 and 123,600.40 is: 185,400.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,034.60 : 207,051.90 = 123,600.40 : x
  2. Step 2: Convert to fraction form
    138,034.60/207,051.90 = 123,600.40/x
  3. Step 3: Cross multiply
    138,034.60x = 207,051.90 × 123,600.40
  4. Step 4: Simplify right side
    138,034.60x = 25,591,697,660.76
  5. Step 5: Solve for x
    x = 25,591,697,660.76/138,034.60
  6. Step 6: Final answer
    x = 185,400.60

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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.