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Finding the Fourth Proportional to 159.53, 239.20 and 68.18

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Solution

The fourth proportional to 159.53, 239.20 and 68.18 is: 102.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.53 : 239.20 = 68.18 : x
  2. Step 2: Convert to fraction form
    159.53/239.20 = 68.18/x
  3. Step 3: Cross multiply
    159.53x = 239.20 × 68.18
  4. Step 4: Simplify right side
    159.53x = 16,307.29
  5. Step 5: Solve for x
    x = 16,307.29/159.53
  6. Step 6: Final answer
    x = 102.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.