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Finding the Fourth Proportional to 79.19, 119.33 and 65.96

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Solution

The fourth proportional to 79.19, 119.33 and 65.96 is: 99.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.19 : 119.33 = 65.96 : x
  2. Step 2: Convert to fraction form
    79.19/119.33 = 65.96/x
  3. Step 3: Cross multiply
    79.19x = 119.33 × 65.96
  4. Step 4: Simplify right side
    79.19x = 7,870.68
  5. Step 5: Solve for x
    x = 7,870.68/79.19
  6. Step 6: Final answer
    x = 99.39

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.