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Finding the Fourth Proportional to 178.18, 266.17 and 129.01

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Solution

The fourth proportional to 178.18, 266.17 and 129.01 is: 192.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.18 : 266.17 = 129.01 : x
  2. Step 2: Convert to fraction form
    178.18/266.17 = 129.01/x
  3. Step 3: Cross multiply
    178.18x = 266.17 × 129.01
  4. Step 4: Simplify right side
    178.18x = 34,337.93
  5. Step 5: Solve for x
    x = 34,337.93/178.18
  6. Step 6: Final answer
    x = 192.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.