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Finding the Fourth Proportional to 79.85, 119.05 and 76.01

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Solution

The fourth proportional to 79.85, 119.05 and 76.01 is: 113.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.85 : 119.05 = 76.01 : x
  2. Step 2: Convert to fraction form
    79.85/119.05 = 76.01/x
  3. Step 3: Cross multiply
    79.85x = 119.05 × 76.01
  4. Step 4: Simplify right side
    79.85x = 9,048.99
  5. Step 5: Solve for x
    x = 9,048.99/79.85
  6. Step 6: Final answer
    x = 113.32

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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.