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Finding the Fourth Proportional to 123.42, 185.96 and 102.22

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Solution

The fourth proportional to 123.42, 185.96 and 102.22 is: 154.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.42 : 185.96 = 102.22 : x
  2. Step 2: Convert to fraction form
    123.42/185.96 = 102.22/x
  3. Step 3: Cross multiply
    123.42x = 185.96 × 102.22
  4. Step 4: Simplify right side
    123.42x = 19,009.17
  5. Step 5: Solve for x
    x = 19,009.17/123.42
  6. Step 6: Final answer
    x = 154.02

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.