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Finding the Fourth Proportional to 138,744.99, 191,468.67 and 75,082.79

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Solution

The fourth proportional to 138,744.99, 191,468.67 and 75,082.79 is: 103,614.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,744.99 : 191,468.67 = 75,082.79 : x
  2. Step 2: Convert to fraction form
    138,744.99/191,468.67 = 75,082.79/x
  3. Step 3: Cross multiply
    138,744.99x = 191,468.67 × 75,082.79
  4. Step 4: Simplify right side
    138,744.99x = 14,376,000,983.85
  5. Step 5: Solve for x
    x = 14,376,000,983.85/138,744.99
  6. Step 6: Final answer
    x = 103,614.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.