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Finding the Fourth Proportional to 72,723.40, 100,314.78 and 44,379.88

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Solution

The fourth proportional to 72,723.40, 100,314.78 and 44,379.88 is: 61,217.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,723.40 : 100,314.78 = 44,379.88 : x
  2. Step 2: Convert to fraction form
    72,723.40/100,314.78 = 44,379.88/x
  3. Step 3: Cross multiply
    72,723.40x = 100,314.78 × 44,379.88
  4. Step 4: Simplify right side
    72,723.40x = 4,451,957,898.63
  5. Step 5: Solve for x
    x = 4,451,957,898.63/72,723.40
  6. Step 6: Final answer
    x = 61,217.68

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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.