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Finding the Fourth Proportional to 177.66, 266.03 and 128.70

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Solution

The fourth proportional to 177.66, 266.03 and 128.70 is: 192.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.66 : 266.03 = 128.70 : x
  2. Step 2: Convert to fraction form
    177.66/266.03 = 128.70/x
  3. Step 3: Cross multiply
    177.66x = 266.03 × 128.70
  4. Step 4: Simplify right side
    177.66x = 34,238.06
  5. Step 5: Solve for x
    x = 34,238.06/177.66
  6. Step 6: Final answer
    x = 192.72

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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.