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Finding the Fourth Proportional to 71.70, 98.33 and 68.19

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Solution

The fourth proportional to 71.70, 98.33 and 68.19 is: 93.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.70 : 98.33 = 68.19 : x
  2. Step 2: Convert to fraction form
    71.70/98.33 = 68.19/x
  3. Step 3: Cross multiply
    71.70x = 98.33 × 68.19
  4. Step 4: Simplify right side
    71.70x = 6,704.78
  5. Step 5: Solve for x
    x = 6,704.78/71.70
  6. Step 6: Final answer
    x = 93.51

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.