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Finding the Fourth Proportional to 79.31, 118.26 and 73.44

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Solution

The fourth proportional to 79.31, 118.26 and 73.44 is: 109.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.31 : 118.26 = 73.44 : x
  2. Step 2: Convert to fraction form
    79.31/118.26 = 73.44/x
  3. Step 3: Cross multiply
    79.31x = 118.26 × 73.44
  4. Step 4: Simplify right side
    79.31x = 8,685.01
  5. Step 5: Solve for x
    x = 8,685.01/79.31
  6. Step 6: Final answer
    x = 109.50

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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.