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Finding the Fourth Proportional to 73.34, 109.15 and 73.11

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Solution

The fourth proportional to 73.34, 109.15 and 73.11 is: 108.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.34 : 109.15 = 73.11 : x
  2. Step 2: Convert to fraction form
    73.34/109.15 = 73.11/x
  3. Step 3: Cross multiply
    73.34x = 109.15 × 73.11
  4. Step 4: Simplify right side
    73.34x = 7,979.96
  5. Step 5: Solve for x
    x = 7,979.96/73.34
  6. Step 6: Final answer
    x = 108.81

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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.