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Finding the Fourth Proportional to 79.30, 108.84 and 73.14

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Solution

The fourth proportional to 79.30, 108.84 and 73.14 is: 100.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.30 : 108.84 = 73.14 : x
  2. Step 2: Convert to fraction form
    79.30/108.84 = 73.14/x
  3. Step 3: Cross multiply
    79.30x = 108.84 × 73.14
  4. Step 4: Simplify right side
    79.30x = 7,960.42
  5. Step 5: Solve for x
    x = 7,960.42/79.30
  6. Step 6: Final answer
    x = 100.39

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.