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Finding the Fourth Proportional to 72,169.70, 108,279.05 and 38,893.10

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Solution

The fourth proportional to 72,169.70, 108,279.05 and 38,893.10 is: 58,352.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,169.70 : 108,279.05 = 38,893.10 : x
  2. Step 2: Convert to fraction form
    72,169.70/108,279.05 = 38,893.10/x
  3. Step 3: Cross multiply
    72,169.70x = 108,279.05 × 38,893.10
  4. Step 4: Simplify right side
    72,169.70x = 4,211,307,183.69
  5. Step 5: Solve for x
    x = 4,211,307,183.69/72,169.70
  6. Step 6: Final answer
    x = 58,352.85

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1.5x scale

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.