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Finding the Fourth Proportional to 187.47, 281.20 and 65.73

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Solution

The fourth proportional to 187.47, 281.20 and 65.73 is: 98.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.47 : 281.20 = 65.73 : x
  2. Step 2: Convert to fraction form
    187.47/281.20 = 65.73/x
  3. Step 3: Cross multiply
    187.47x = 281.20 × 65.73
  4. Step 4: Simplify right side
    187.47x = 18,483.28
  5. Step 5: Solve for x
    x = 18,483.28/187.47
  6. Step 6: Final answer
    x = 98.59

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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.