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Finding the Fourth Proportional to 73.57, 110.41 and 43.20

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Solution

The fourth proportional to 73.57, 110.41 and 43.20 is: 64.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.57 : 110.41 = 43.20 : x
  2. Step 2: Convert to fraction form
    73.57/110.41 = 43.20/x
  3. Step 3: Cross multiply
    73.57x = 110.41 × 43.20
  4. Step 4: Simplify right side
    73.57x = 4,769.22
  5. Step 5: Solve for x
    x = 4,769.22/73.57
  6. Step 6: Final answer
    x = 64.82

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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.