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Finding the Fourth Proportional to 148.22, 204.18 and 123.80

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Solution

The fourth proportional to 148.22, 204.18 and 123.80 is: 170.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.22 : 204.18 = 123.80 : x
  2. Step 2: Convert to fraction form
    148.22/204.18 = 123.80/x
  3. Step 3: Cross multiply
    148.22x = 204.18 × 123.80
  4. Step 4: Simplify right side
    148.22x = 25,277.48
  5. Step 5: Solve for x
    x = 25,277.48/148.22
  6. Step 6: Final answer
    x = 170.54

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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.