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Finding the Fourth Proportional to 154.90, 213.97 and 124.03

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Solution

The fourth proportional to 154.90, 213.97 and 124.03 is: 171.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.90 : 213.97 = 124.03 : x
  2. Step 2: Convert to fraction form
    154.90/213.97 = 124.03/x
  3. Step 3: Cross multiply
    154.90x = 213.97 × 124.03
  4. Step 4: Simplify right side
    154.90x = 26,538.08
  5. Step 5: Solve for x
    x = 26,538.08/154.90
  6. Step 6: Final answer
    x = 171.32

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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.