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Finding the Fourth Proportional to 73.19, 100.34 and 72.12

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Solution

The fourth proportional to 73.19, 100.34 and 72.12 is: 98.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.19 : 100.34 = 72.12 : x
  2. Step 2: Convert to fraction form
    73.19/100.34 = 72.12/x
  3. Step 3: Cross multiply
    73.19x = 100.34 × 72.12
  4. Step 4: Simplify right side
    73.19x = 7,236.16
  5. Step 5: Solve for x
    x = 7,236.16/73.19
  6. Step 6: Final answer
    x = 98.87

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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.