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Finding the Fourth Proportional to 43,169.92, 64,737.84 and 20,976.72

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Solution

The fourth proportional to 43,169.92, 64,737.84 and 20,976.72 is: 31,456.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,169.92 : 64,737.84 = 20,976.72 : x
  2. Step 2: Convert to fraction form
    43,169.92/64,737.84 = 20,976.72/x
  3. Step 3: Cross multiply
    43,169.92x = 64,737.84 × 20,976.72
  4. Step 4: Simplify right side
    43,169.92x = 1,357,987,543.08
  5. Step 5: Solve for x
    x = 1,357,987,543.08/43,169.92
  6. Step 6: Final answer
    x = 31,456.80

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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.