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Finding the Fourth Proportional to 124.08, 187.04 and 111.53

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Solution

The fourth proportional to 124.08, 187.04 and 111.53 is: 168.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.08 : 187.04 = 111.53 : x
  2. Step 2: Convert to fraction form
    124.08/187.04 = 111.53/x
  3. Step 3: Cross multiply
    124.08x = 187.04 × 111.53
  4. Step 4: Simplify right side
    124.08x = 20,859.08
  5. Step 5: Solve for x
    x = 20,859.08/124.08
  6. Step 6: Final answer
    x = 168.11

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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.