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Finding the Fourth Proportional to 96.76, 133.59 and 86.50

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Solution

The fourth proportional to 96.76, 133.59 and 86.50 is: 119.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.76 : 133.59 = 86.50 : x
  2. Step 2: Convert to fraction form
    96.76/133.59 = 86.50/x
  3. Step 3: Cross multiply
    96.76x = 133.59 × 86.50
  4. Step 4: Simplify right side
    96.76x = 11,555.54
  5. Step 5: Solve for x
    x = 11,555.54/96.76
  6. Step 6: Final answer
    x = 119.42

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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.