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Finding the Fourth Proportional to 138,701.70, 208,052.55 and 50,055.30

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Solution

The fourth proportional to 138,701.70, 208,052.55 and 50,055.30 is: 75,082.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,701.70 : 208,052.55 = 50,055.30 : x
  2. Step 2: Convert to fraction form
    138,701.70/208,052.55 = 50,055.30/x
  3. Step 3: Cross multiply
    138,701.70x = 208,052.55 × 50,055.30
  4. Step 4: Simplify right side
    138,701.70x = 10,414,132,806.02
  5. Step 5: Solve for x
    x = 10,414,132,806.02/138,701.70
  6. Step 6: Final answer
    x = 75,082.95

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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.