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Finding the Fourth Proportional to 177.88, 266.80 and 47.86

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Solution

The fourth proportional to 177.88, 266.80 and 47.86 is: 71.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.88 : 266.80 = 47.86 : x
  2. Step 2: Convert to fraction form
    177.88/266.80 = 47.86/x
  3. Step 3: Cross multiply
    177.88x = 266.80 × 47.86
  4. Step 4: Simplify right side
    177.88x = 12,769.05
  5. Step 5: Solve for x
    x = 12,769.05/177.88
  6. Step 6: Final answer
    x = 71.78

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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.