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Finding the Fourth Proportional to 97.20, 146.48 and 94.91

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Solution

The fourth proportional to 97.20, 146.48 and 94.91 is: 143.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.20 : 146.48 = 94.91 : x
  2. Step 2: Convert to fraction form
    97.20/146.48 = 94.91/x
  3. Step 3: Cross multiply
    97.20x = 146.48 × 94.91
  4. Step 4: Simplify right side
    97.20x = 13,901.21
  5. Step 5: Solve for x
    x = 13,901.21/97.20
  6. Step 6: Final answer
    x = 143.02

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.