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Finding the Fourth Proportional to 79.49, 119.13 and 45.22

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Solution

The fourth proportional to 79.49, 119.13 and 45.22 is: 67.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.49 : 119.13 = 45.22 : x
  2. Step 2: Convert to fraction form
    79.49/119.13 = 45.22/x
  3. Step 3: Cross multiply
    79.49x = 119.13 × 45.22
  4. Step 4: Simplify right side
    79.49x = 5,387.06
  5. Step 5: Solve for x
    x = 5,387.06/79.49
  6. Step 6: Final answer
    x = 67.77

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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.