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Finding the Fourth Proportional to 98.13, 147.15 and 29.63

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Solution

The fourth proportional to 98.13, 147.15 and 29.63 is: 44.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.13 : 147.15 = 29.63 : x
  2. Step 2: Convert to fraction form
    98.13/147.15 = 29.63/x
  3. Step 3: Cross multiply
    98.13x = 147.15 × 29.63
  4. Step 4: Simplify right side
    98.13x = 4,360.05
  5. Step 5: Solve for x
    x = 4,360.05/98.13
  6. Step 6: Final answer
    x = 44.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.