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Finding the Fourth Proportional to 79.08, 118.74 and 74.76

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Solution

The fourth proportional to 79.08, 118.74 and 74.76 is: 112.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.08 : 118.74 = 74.76 : x
  2. Step 2: Convert to fraction form
    79.08/118.74 = 74.76/x
  3. Step 3: Cross multiply
    79.08x = 118.74 × 74.76
  4. Step 4: Simplify right side
    79.08x = 8,877.00
  5. Step 5: Solve for x
    x = 8,877.00/79.08
  6. Step 6: Final answer
    x = 112.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.