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Finding the Fourth Proportional to 177.64, 266.66 and 142

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Solution

The fourth proportional to 177.64, 266.66 and 142 is: 213.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.64 : 266.66 = 142 : x
  2. Step 2: Convert to fraction form
    177.64/266.66 = 142/x
  3. Step 3: Cross multiply
    177.64x = 266.66 × 142
  4. Step 4: Simplify right side
    177.64x = 37,865.72
  5. Step 5: Solve for x
    x = 37,865.72/177.64
  6. Step 6: Final answer
    x = 213.16

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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.