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Finding the Fourth Proportional to 73.63, 110.49 and 43.21

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Solution

The fourth proportional to 73.63, 110.49 and 43.21 is: 64.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.63 : 110.49 = 43.21 : x
  2. Step 2: Convert to fraction form
    73.63/110.49 = 43.21/x
  3. Step 3: Cross multiply
    73.63x = 110.49 × 43.21
  4. Step 4: Simplify right side
    73.63x = 4,774.27
  5. Step 5: Solve for x
    x = 4,774.27/73.63
  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.