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Finding the Fourth Proportional to 138,315.70, 207,473.55 and 123,541.30

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Solution

The fourth proportional to 138,315.70, 207,473.55 and 123,541.30 is: 185,311.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,315.70 : 207,473.55 = 123,541.30 : x
  2. Step 2: Convert to fraction form
    138,315.70/207,473.55 = 123,541.30/x
  3. Step 3: Cross multiply
    138,315.70x = 207,473.55 × 123,541.30
  4. Step 4: Simplify right side
    138,315.70x = 25,631,552,082.62
  5. Step 5: Solve for x
    x = 25,631,552,082.62/138,315.70
  6. Step 6: Final answer
    x = 185,311.95

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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.