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Finding the Fourth Proportional to 159,663.68, 220,350.66 and 91,689.56

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Solution

The fourth proportional to 159,663.68, 220,350.66 and 91,689.56 is: 126,540.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,663.68 : 220,350.66 = 91,689.56 : x
  2. Step 2: Convert to fraction form
    159,663.68/220,350.66 = 91,689.56/x
  3. Step 3: Cross multiply
    159,663.68x = 220,350.66 × 91,689.56
  4. Step 4: Simplify right side
    159,663.68x = 20,203,855,061.11
  5. Step 5: Solve for x
    x = 20,203,855,061.11/159,663.68
  6. Step 6: Final answer
    x = 126,540.08

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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.