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Finding the Fourth Proportional to 98.52, 136.08 and 79.26

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Solution

The fourth proportional to 98.52, 136.08 and 79.26 is: 109.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.52 : 136.08 = 79.26 : x
  2. Step 2: Convert to fraction form
    98.52/136.08 = 79.26/x
  3. Step 3: Cross multiply
    98.52x = 136.08 × 79.26
  4. Step 4: Simplify right side
    98.52x = 10,785.70
  5. Step 5: Solve for x
    x = 10,785.70/98.52
  6. Step 6: Final answer
    x = 109.48

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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.