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Finding the Fourth Proportional to 96.55, 143.97 and 84.40

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Solution

The fourth proportional to 96.55, 143.97 and 84.40 is: 125.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.55 : 143.97 = 84.40 : x
  2. Step 2: Convert to fraction form
    96.55/143.97 = 84.40/x
  3. Step 3: Cross multiply
    96.55x = 143.97 × 84.40
  4. Step 4: Simplify right side
    96.55x = 12,150.87
  5. Step 5: Solve for x
    x = 12,150.87/96.55
  6. Step 6: Final answer
    x = 125.85

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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.