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Finding the Fourth Proportional to 187.16, 258.15 and 124.96

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Solution

The fourth proportional to 187.16, 258.15 and 124.96 is: 172.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.16 : 258.15 = 124.96 : x
  2. Step 2: Convert to fraction form
    187.16/258.15 = 124.96/x
  3. Step 3: Cross multiply
    187.16x = 258.15 × 124.96
  4. Step 4: Simplify right side
    187.16x = 32,258.42
  5. Step 5: Solve for x
    x = 32,258.42/187.16
  6. Step 6: Final answer
    x = 172.36

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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.