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Finding the Fourth Proportional to 185.95, 256.67 and 123.96

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Solution

The fourth proportional to 185.95, 256.67 and 123.96 is: 171.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.95 : 256.67 = 123.96 : x
  2. Step 2: Convert to fraction form
    185.95/256.67 = 123.96/x
  3. Step 3: Cross multiply
    185.95x = 256.67 × 123.96
  4. Step 4: Simplify right side
    185.95x = 31,816.81
  5. Step 5: Solve for x
    x = 31,816.81/185.95
  6. Step 6: Final answer
    x = 171.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.