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Finding the Fourth Proportional to 99.12, 148.48 and 73.41

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Solution

The fourth proportional to 99.12, 148.48 and 73.41 is: 109.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.12 : 148.48 = 73.41 : x
  2. Step 2: Convert to fraction form
    99.12/148.48 = 73.41/x
  3. Step 3: Cross multiply
    99.12x = 148.48 × 73.41
  4. Step 4: Simplify right side
    99.12x = 10,899.59
  5. Step 5: Solve for x
    x = 10,899.59/99.12
  6. Step 6: Final answer
    x = 109.96

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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.