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Finding the Fourth Proportional to 79.44, 118.50 and 73.68

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Solution

The fourth proportional to 79.44, 118.50 and 73.68 is: 109.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.44 : 118.50 = 73.68 : x
  2. Step 2: Convert to fraction form
    79.44/118.50 = 73.68/x
  3. Step 3: Cross multiply
    79.44x = 118.50 × 73.68
  4. Step 4: Simplify right side
    79.44x = 8,731.08
  5. Step 5: Solve for x
    x = 8,731.08/79.44
  6. Step 6: Final answer
    x = 109.91

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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.