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Finding the Fourth Proportional to 124.80, 168.48 and 124.80

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Solution

The fourth proportional to 124.80, 168.48 and 124.80 is: 168.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.80 : 168.48 = 124.80 : x
  2. Step 2: Convert to fraction form
    124.80/168.48 = 124.80/x
  3. Step 3: Cross multiply
    124.80x = 168.48 × 124.80
  4. Step 4: Simplify right side
    124.80x = 21,026.30
  5. Step 5: Solve for x
    x = 21,026.30/124.80
  6. Step 6: Final answer
    x = 168.48

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.