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Finding the Fourth Proportional to 187.54, 281.40 and 79.54

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Solution

The fourth proportional to 187.54, 281.40 and 79.54 is: 119.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.54 : 281.40 = 79.54 : x
  2. Step 2: Convert to fraction form
    187.54/281.40 = 79.54/x
  3. Step 3: Cross multiply
    187.54x = 281.40 × 79.54
  4. Step 4: Simplify right side
    187.54x = 22,382.56
  5. Step 5: Solve for x
    x = 22,382.56/187.54
  6. Step 6: Final answer
    x = 119.35

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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.