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Finding the Fourth Proportional to 63,621.20, 87,805.32 and 38,484.56

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Solution

The fourth proportional to 63,621.20, 87,805.32 and 38,484.56 is: 53,113.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,621.20 : 87,805.32 = 38,484.56 : x
  2. Step 2: Convert to fraction form
    63,621.20/87,805.32 = 38,484.56/x
  3. Step 3: Cross multiply
    63,621.20x = 87,805.32 × 38,484.56
  4. Step 4: Simplify right side
    63,621.20x = 3,379,149,105.86
  5. Step 5: Solve for x
    x = 3,379,149,105.86/63,621.20
  6. Step 6: Final answer
    x = 53,113.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.