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Finding the Fourth Proportional to 72,205.35, 99,673.70 and 43,920.87

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Solution

The fourth proportional to 72,205.35, 99,673.70 and 43,920.87 is: 60,629.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,205.35 : 99,673.70 = 43,920.87 : x
  2. Step 2: Convert to fraction form
    72,205.35/99,673.70 = 43,920.87/x
  3. Step 3: Cross multiply
    72,205.35x = 99,673.70 × 43,920.87
  4. Step 4: Simplify right side
    72,205.35x = 4,377,755,620.12
  5. Step 5: Solve for x
    x = 4,377,755,620.12/72,205.35
  6. Step 6: Final answer
    x = 60,629.24

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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.