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Finding the Fourth Proportional to 177.53, 266.31 and 90.81

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Solution

The fourth proportional to 177.53, 266.31 and 90.81 is: 136.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.53 : 266.31 = 90.81 : x
  2. Step 2: Convert to fraction form
    177.53/266.31 = 90.81/x
  3. Step 3: Cross multiply
    177.53x = 266.31 × 90.81
  4. Step 4: Simplify right side
    177.53x = 24,183.61
  5. Step 5: Solve for x
    x = 24,183.61/177.53
  6. Step 6: Final answer
    x = 136.23

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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.