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Finding the Fourth Proportional to 187.85, 281.95 and 123.05

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Solution

The fourth proportional to 187.85, 281.95 and 123.05 is: 184.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.85 : 281.95 = 123.05 : x
  2. Step 2: Convert to fraction form
    187.85/281.95 = 123.05/x
  3. Step 3: Cross multiply
    187.85x = 281.95 × 123.05
  4. Step 4: Simplify right side
    187.85x = 34,694.34
  5. Step 5: Solve for x
    x = 34,694.34/187.85
  6. Step 6: Final answer
    x = 184.69

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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.