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Finding the Fourth Proportional to 124.73, 172.11 and 75.60

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Solution

The fourth proportional to 124.73, 172.11 and 75.60 is: 104.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.73 : 172.11 = 75.60 : x
  2. Step 2: Convert to fraction form
    124.73/172.11 = 75.60/x
  3. Step 3: Cross multiply
    124.73x = 172.11 × 75.60
  4. Step 4: Simplify right side
    124.73x = 13,011.52
  5. Step 5: Solve for x
    x = 13,011.52/124.73
  6. Step 6: Final answer
    x = 104.32

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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.