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Finding the Fourth Proportional to 159.61, 220.29 and 101.38

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Solution

The fourth proportional to 159.61, 220.29 and 101.38 is: 139.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.61 : 220.29 = 101.38 : x
  2. Step 2: Convert to fraction form
    159.61/220.29 = 101.38/x
  3. Step 3: Cross multiply
    159.61x = 220.29 × 101.38
  4. Step 4: Simplify right side
    159.61x = 22,331.90
  5. Step 5: Solve for x
    x = 22,331.90/159.61
  6. Step 6: Final answer
    x = 139.92

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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.