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Finding the Fourth Proportional to 73.59, 110.42 and 43.21

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Solution

The fourth proportional to 73.59, 110.42 and 43.21 is: 64.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.59 : 110.42 = 43.21 : x
  2. Step 2: Convert to fraction form
    73.59/110.42 = 43.21/x
  3. Step 3: Cross multiply
    73.59x = 110.42 × 43.21
  4. Step 4: Simplify right side
    73.59x = 4,771.33
  5. Step 5: Solve for x
    x = 4,771.33/73.59
  6. Step 6: Final answer
    x = 64.84

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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.