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Finding the Fourth Proportional to 155.25, 214.16 and 113.73

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Solution

The fourth proportional to 155.25, 214.16 and 113.73 is: 156.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.25 : 214.16 = 113.73 : x
  2. Step 2: Convert to fraction form
    155.25/214.16 = 113.73/x
  3. Step 3: Cross multiply
    155.25x = 214.16 × 113.73
  4. Step 4: Simplify right side
    155.25x = 24,356.42
  5. Step 5: Solve for x
    x = 24,356.42/155.25
  6. Step 6: Final answer
    x = 156.89

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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.