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Finding the Fourth Proportional to 138,040.20, 207,060.30 and 49,296.60

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Solution

The fourth proportional to 138,040.20, 207,060.30 and 49,296.60 is: 73,944.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,040.20 : 207,060.30 = 49,296.60 : x
  2. Step 2: Convert to fraction form
    138,040.20/207,060.30 = 49,296.60/x
  3. Step 3: Cross multiply
    138,040.20x = 207,060.30 × 49,296.60
  4. Step 4: Simplify right side
    138,040.20x = 10,207,368,784.98
  5. Step 5: Solve for x
    x = 10,207,368,784.98/138,040.20
  6. Step 6: Final answer
    x = 73,944.90

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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.