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Finding the Fourth Proportional to 99.91, 149.02 and 96.87

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Solution

The fourth proportional to 99.91, 149.02 and 96.87 is: 144.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.91 : 149.02 = 96.87 : x
  2. Step 2: Convert to fraction form
    99.91/149.02 = 96.87/x
  3. Step 3: Cross multiply
    99.91x = 149.02 × 96.87
  4. Step 4: Simplify right side
    99.91x = 14,434.95
  5. Step 5: Solve for x
    x = 14,434.95/99.91
  6. Step 6: Final answer
    x = 144.49

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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.