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Finding the Fourth Proportional to 154.74, 213.51 and 88.35

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Solution

The fourth proportional to 154.74, 213.51 and 88.35 is: 121.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.74 : 213.51 = 88.35 : x
  2. Step 2: Convert to fraction form
    154.74/213.51 = 88.35/x
  3. Step 3: Cross multiply
    154.74x = 213.51 × 88.35
  4. Step 4: Simplify right side
    154.74x = 18,862.10
  5. Step 5: Solve for x
    x = 18,862.10/154.74
  6. Step 6: Final answer
    x = 121.90

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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.