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Finding the Fourth Proportional to 100.33, 149.66 and 98.68

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Solution

The fourth proportional to 100.33, 149.66 and 98.68 is: 147.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100.33 : 149.66 = 98.68 : x
  2. Step 2: Convert to fraction form
    100.33/149.66 = 98.68/x
  3. Step 3: Cross multiply
    100.33x = 149.66 × 98.68
  4. Step 4: Simplify right side
    100.33x = 14,768.45
  5. Step 5: Solve for x
    x = 14,768.45/100.33
  6. Step 6: Final answer
    x = 147.20

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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.