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Finding the Fourth Proportional to 148.48, 204.43 and 123.87

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Solution

The fourth proportional to 148.48, 204.43 and 123.87 is: 170.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.48 : 204.43 = 123.87 : x
  2. Step 2: Convert to fraction form
    148.48/204.43 = 123.87/x
  3. Step 3: Cross multiply
    148.48x = 204.43 × 123.87
  4. Step 4: Simplify right side
    148.48x = 25,322.74
  5. Step 5: Solve for x
    x = 25,322.74/148.48
  6. Step 6: Final answer
    x = 170.55

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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.