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Finding the Fourth Proportional to 98.82, 136.18 and 69.66

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Solution

The fourth proportional to 98.82, 136.18 and 69.66 is: 96.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.82 : 136.18 = 69.66 : x
  2. Step 2: Convert to fraction form
    98.82/136.18 = 69.66/x
  3. Step 3: Cross multiply
    98.82x = 136.18 × 69.66
  4. Step 4: Simplify right side
    98.82x = 9,486.39
  5. Step 5: Solve for x
    x = 9,486.39/98.82
  6. Step 6: Final answer
    x = 96.00

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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.