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Finding the Fourth Proportional to 124.89, 172.31 and 92.08

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Solution

The fourth proportional to 124.89, 172.31 and 92.08 is: 127.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.89 : 172.31 = 92.08 : x
  2. Step 2: Convert to fraction form
    124.89/172.31 = 92.08/x
  3. Step 3: Cross multiply
    124.89x = 172.31 × 92.08
  4. Step 4: Simplify right side
    124.89x = 15,866.30
  5. Step 5: Solve for x
    x = 15,866.30/124.89
  6. Step 6: Final answer
    x = 127.04

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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.