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Finding the Fourth Proportional to 187.48, 281.12 and 100.76

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Solution

The fourth proportional to 187.48, 281.12 and 100.76 is: 151.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.48 : 281.12 = 100.76 : x
  2. Step 2: Convert to fraction form
    187.48/281.12 = 100.76/x
  3. Step 3: Cross multiply
    187.48x = 281.12 × 100.76
  4. Step 4: Simplify right side
    187.48x = 28,325.89
  5. Step 5: Solve for x
    x = 28,325.89/187.48
  6. Step 6: Final answer
    x = 151.09

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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.