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Finding the Fourth Proportional to 177.81, 266.29 and 136.90

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Solution

The fourth proportional to 177.81, 266.29 and 136.90 is: 205.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.81 : 266.29 = 136.90 : x
  2. Step 2: Convert to fraction form
    177.81/266.29 = 136.90/x
  3. Step 3: Cross multiply
    177.81x = 266.29 × 136.90
  4. Step 4: Simplify right side
    177.81x = 36,455.10
  5. Step 5: Solve for x
    x = 36,455.10/177.81
  6. Step 6: Final answer
    x = 205.02

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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.