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Finding the Fourth Proportional to 124.47, 172.97 and 123.22

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Solution

The fourth proportional to 124.47, 172.97 and 123.22 is: 171.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.47 : 172.97 = 123.22 : x
  2. Step 2: Convert to fraction form
    124.47/172.97 = 123.22/x
  3. Step 3: Cross multiply
    124.47x = 172.97 × 123.22
  4. Step 4: Simplify right side
    124.47x = 21,313.43
  5. Step 5: Solve for x
    x = 21,313.43/124.47
  6. Step 6: Final answer
    x = 171.23

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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.