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Finding the Fourth Proportional to 187.65, 281.52 and 65.91

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Solution

The fourth proportional to 187.65, 281.52 and 65.91 is: 98.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.65 : 281.52 = 65.91 : x
  2. Step 2: Convert to fraction form
    187.65/281.52 = 65.91/x
  3. Step 3: Cross multiply
    187.65x = 281.52 × 65.91
  4. Step 4: Simplify right side
    187.65x = 18,554.98
  5. Step 5: Solve for x
    x = 18,554.98/187.65
  6. Step 6: Final answer
    x = 98.88

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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.