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Finding the Fourth Proportional to 91.19, 136.83 and 73.28

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Solution

The fourth proportional to 91.19, 136.83 and 73.28 is: 109.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.19 : 136.83 = 73.28 : x
  2. Step 2: Convert to fraction form
    91.19/136.83 = 73.28/x
  3. Step 3: Cross multiply
    91.19x = 136.83 × 73.28
  4. Step 4: Simplify right side
    91.19x = 10,026.90
  5. Step 5: Solve for x
    x = 10,026.90/91.19
  6. Step 6: Final answer
    x = 109.96

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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.