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Finding the Fourth Proportional to 124.75, 172.08 and 104.11

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Solution

The fourth proportional to 124.75, 172.08 and 104.11 is: 143.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.75 : 172.08 = 104.11 : x
  2. Step 2: Convert to fraction form
    124.75/172.08 = 104.11/x
  3. Step 3: Cross multiply
    124.75x = 172.08 × 104.11
  4. Step 4: Simplify right side
    124.75x = 17,915.25
  5. Step 5: Solve for x
    x = 17,915.25/124.75
  6. Step 6: Final answer
    x = 143.61

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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.