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Finding the Fourth Proportional to 96.96, 146.28 and 91.89

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Solution

The fourth proportional to 96.96, 146.28 and 91.89 is: 138.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.96 : 146.28 = 91.89 : x
  2. Step 2: Convert to fraction form
    96.96/146.28 = 91.89/x
  3. Step 3: Cross multiply
    96.96x = 146.28 × 91.89
  4. Step 4: Simplify right side
    96.96x = 13,441.67
  5. Step 5: Solve for x
    x = 13,441.67/96.96
  6. Step 6: Final answer
    x = 138.63

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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.