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Finding the Fourth Proportional to 124.57, 172.73 and 120.47

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Solution

The fourth proportional to 124.57, 172.73 and 120.47 is: 167.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.57 : 172.73 = 120.47 : x
  2. Step 2: Convert to fraction form
    124.57/172.73 = 120.47/x
  3. Step 3: Cross multiply
    124.57x = 172.73 × 120.47
  4. Step 4: Simplify right side
    124.57x = 20,808.78
  5. Step 5: Solve for x
    x = 20,808.78/124.57
  6. Step 6: Final answer
    x = 167.05

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.