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Finding the Fourth Proportional to 187.42, 258.65 and 104.53

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Solution

The fourth proportional to 187.42, 258.65 and 104.53 is: 144.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.42 : 258.65 = 104.53 : x
  2. Step 2: Convert to fraction form
    187.42/258.65 = 104.53/x
  3. Step 3: Cross multiply
    187.42x = 258.65 × 104.53
  4. Step 4: Simplify right side
    187.42x = 27,036.95
  5. Step 5: Solve for x
    x = 27,036.95/187.42
  6. Step 6: Final answer
    x = 144.26

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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.