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Finding the Fourth Proportional to 187.36, 281.04 and 79.15

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Solution

The fourth proportional to 187.36, 281.04 and 79.15 is: 118.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.36 : 281.04 = 79.15 : x
  2. Step 2: Convert to fraction form
    187.36/281.04 = 79.15/x
  3. Step 3: Cross multiply
    187.36x = 281.04 × 79.15
  4. Step 4: Simplify right side
    187.36x = 22,244.32
  5. Step 5: Solve for x
    x = 22,244.32/187.36
  6. Step 6: Final answer
    x = 118.73

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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.