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Finding the Fourth Proportional to 98.98, 147.49 and 95.71

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Solution

The fourth proportional to 98.98, 147.49 and 95.71 is: 142.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.98 : 147.49 = 95.71 : x
  2. Step 2: Convert to fraction form
    98.98/147.49 = 95.71/x
  3. Step 3: Cross multiply
    98.98x = 147.49 × 95.71
  4. Step 4: Simplify right side
    98.98x = 14,116.27
  5. Step 5: Solve for x
    x = 14,116.27/98.98
  6. Step 6: Final answer
    x = 142.62

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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.