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Finding the Fourth Proportional to 99.81, 148.87 and 96.77

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Solution

The fourth proportional to 99.81, 148.87 and 96.77 is: 144.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.81 : 148.87 = 96.77 : x
  2. Step 2: Convert to fraction form
    99.81/148.87 = 96.77/x
  3. Step 3: Cross multiply
    99.81x = 148.87 × 96.77
  4. Step 4: Simplify right side
    99.81x = 14,404.92
  5. Step 5: Solve for x
    x = 14,404.92/99.81
  6. Step 6: Final answer
    x = 144.33

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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.