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Finding the Fourth Proportional to 96.51, 143.79 and 91.92

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Solution

The fourth proportional to 96.51, 143.79 and 91.92 is: 136.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.51 : 143.79 = 91.92 : x
  2. Step 2: Convert to fraction form
    96.51/143.79 = 91.92/x
  3. Step 3: Cross multiply
    96.51x = 143.79 × 91.92
  4. Step 4: Simplify right side
    96.51x = 13,217.18
  5. Step 5: Solve for x
    x = 13,217.18/96.51
  6. Step 6: Final answer
    x = 136.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.