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Finding the Fourth Proportional to 72,379.80, 99,865.20 and 41,745.48

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Solution

The fourth proportional to 72,379.80, 99,865.20 and 41,745.48 is: 57,597.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,379.80 : 99,865.20 = 41,745.48 : x
  2. Step 2: Convert to fraction form
    72,379.80/99,865.20 = 41,745.48/x
  3. Step 3: Cross multiply
    72,379.80x = 99,865.20 × 41,745.48
  4. Step 4: Simplify right side
    72,379.80x = 4,168,920,709.30
  5. Step 5: Solve for x
    x = 4,168,920,709.30/72,379.80
  6. Step 6: Final answer
    x = 57,597.85

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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.