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Finding the Fourth Proportional to 123.67, 186.34 and 102.47

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Solution

The fourth proportional to 123.67, 186.34 and 102.47 is: 154.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.67 : 186.34 = 102.47 : x
  2. Step 2: Convert to fraction form
    123.67/186.34 = 102.47/x
  3. Step 3: Cross multiply
    123.67x = 186.34 × 102.47
  4. Step 4: Simplify right side
    123.67x = 19,094.47
  5. Step 5: Solve for x
    x = 19,094.47/123.67
  6. Step 6: Final answer
    x = 154.40

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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.