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Finding the Fourth Proportional to 159.63, 220.52 and 139.92

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Solution

The fourth proportional to 159.63, 220.52 and 139.92 is: 193.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.63 : 220.52 = 139.92 : x
  2. Step 2: Convert to fraction form
    159.63/220.52 = 139.92/x
  3. Step 3: Cross multiply
    159.63x = 220.52 × 139.92
  4. Step 4: Simplify right side
    159.63x = 30,854.46
  5. Step 5: Solve for x
    x = 30,854.46/159.63
  6. Step 6: Final answer
    x = 193.29

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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.