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Finding the Fourth Proportional to 98.85, 148.33 and 44.72

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Solution

The fourth proportional to 98.85, 148.33 and 44.72 is: 67.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.85 : 148.33 = 44.72 : x
  2. Step 2: Convert to fraction form
    98.85/148.33 = 44.72/x
  3. Step 3: Cross multiply
    98.85x = 148.33 × 44.72
  4. Step 4: Simplify right side
    98.85x = 6,633.19
  5. Step 5: Solve for x
    x = 6,633.19/98.85
  6. Step 6: Final answer
    x = 67.10

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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.