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Finding the Fourth Proportional to 49.59, 74.12 and 43.23

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Solution

The fourth proportional to 49.59, 74.12 and 43.23 is: 64.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    49.59 : 74.12 = 43.23 : x
  2. Step 2: Convert to fraction form
    49.59/74.12 = 43.23/x
  3. Step 3: Cross multiply
    49.59x = 74.12 × 43.23
  4. Step 4: Simplify right side
    49.59x = 3,204.21
  5. Step 5: Solve for x
    x = 3,204.21/49.59
  6. Step 6: Final answer
    x = 64.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.