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Finding the Fourth Proportional to 160.42, 240.18 and 121.72

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Solution

The fourth proportional to 160.42, 240.18 and 121.72 is: 182.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.42 : 240.18 = 121.72 : x
  2. Step 2: Convert to fraction form
    160.42/240.18 = 121.72/x
  3. Step 3: Cross multiply
    160.42x = 240.18 × 121.72
  4. Step 4: Simplify right side
    160.42x = 29,234.71
  5. Step 5: Solve for x
    x = 29,234.71/160.42
  6. Step 6: Final answer
    x = 182.24

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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.