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Finding the Fourth Proportional to 149.60, 224.70 and 91.88

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Solution

The fourth proportional to 149.60, 224.70 and 91.88 is: 138.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.60 : 224.70 = 91.88 : x
  2. Step 2: Convert to fraction form
    149.60/224.70 = 91.88/x
  3. Step 3: Cross multiply
    149.60x = 224.70 × 91.88
  4. Step 4: Simplify right side
    149.60x = 20,645.44
  5. Step 5: Solve for x
    x = 20,645.44/149.60
  6. Step 6: Final answer
    x = 138.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.