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Finding the Fourth Proportional to 79.22, 118.85 and 43.13

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Solution

The fourth proportional to 79.22, 118.85 and 43.13 is: 64.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.22 : 118.85 = 43.13 : x
  2. Step 2: Convert to fraction form
    79.22/118.85 = 43.13/x
  3. Step 3: Cross multiply
    79.22x = 118.85 × 43.13
  4. Step 4: Simplify right side
    79.22x = 5,126.08
  5. Step 5: Solve for x
    x = 5,126.08/79.22
  6. Step 6: Final answer
    x = 64.70

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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.