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Finding the Fourth Proportional to 159.16, 219.45 and 103.81

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Solution

The fourth proportional to 159.16, 219.45 and 103.81 is: 143.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.16 : 219.45 = 103.81 : x
  2. Step 2: Convert to fraction form
    159.16/219.45 = 103.81/x
  3. Step 3: Cross multiply
    159.16x = 219.45 × 103.81
  4. Step 4: Simplify right side
    159.16x = 22,781.10
  5. Step 5: Solve for x
    x = 22,781.10/159.16
  6. Step 6: Final answer
    x = 143.13

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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.