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Finding the Fourth Proportional to 147.91, 204.09 and 98.77

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Solution

The fourth proportional to 147.91, 204.09 and 98.77 is: 136.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.91 : 204.09 = 98.77 : x
  2. Step 2: Convert to fraction form
    147.91/204.09 = 98.77/x
  3. Step 3: Cross multiply
    147.91x = 204.09 × 98.77
  4. Step 4: Simplify right side
    147.91x = 20,157.97
  5. Step 5: Solve for x
    x = 20,157.97/147.91
  6. Step 6: Final answer
    x = 136.29

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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.