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Finding the Fourth Proportional to 108.12, 148.98 and 73.56

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Solution

The fourth proportional to 108.12, 148.98 and 73.56 is: 101.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.12 : 148.98 = 73.56 : x
  2. Step 2: Convert to fraction form
    108.12/148.98 = 73.56/x
  3. Step 3: Cross multiply
    108.12x = 148.98 × 73.56
  4. Step 4: Simplify right side
    108.12x = 10,958.97
  5. Step 5: Solve for x
    x = 10,958.97/108.12
  6. Step 6: Final answer
    x = 101.36

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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.