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Finding the Fourth Proportional to 148.80, 204.48 and 124.80

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Solution

The fourth proportional to 148.80, 204.48 and 124.80 is: 171.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.80 : 204.48 = 124.80 : x
  2. Step 2: Convert to fraction form
    148.80/204.48 = 124.80/x
  3. Step 3: Cross multiply
    148.80x = 204.48 × 124.80
  4. Step 4: Simplify right side
    148.80x = 25,519.10
  5. Step 5: Solve for x
    x = 25,519.10/148.80
  6. Step 6: Final answer
    x = 171.50

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.