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Finding the Fourth Proportional to 155.42, 232.89 and 121.10

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Solution

The fourth proportional to 155.42, 232.89 and 121.10 is: 181.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.42 : 232.89 = 121.10 : x
  2. Step 2: Convert to fraction form
    155.42/232.89 = 121.10/x
  3. Step 3: Cross multiply
    155.42x = 232.89 × 121.10
  4. Step 4: Simplify right side
    155.42x = 28,202.98
  5. Step 5: Solve for x
    x = 28,202.98/155.42
  6. Step 6: Final answer
    x = 181.46

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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.