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Finding the Fourth Proportional to 72,879.20, 109,318.80 and 41,692.58

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Solution

The fourth proportional to 72,879.20, 109,318.80 and 41,692.58 is: 62,538.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,879.20 : 109,318.80 = 41,692.58 : x
  2. Step 2: Convert to fraction form
    72,879.20/109,318.80 = 41,692.58/x
  3. Step 3: Cross multiply
    72,879.20x = 109,318.80 × 41,692.58
  4. Step 4: Simplify right side
    72,879.20x = 4,557,782,814.50
  5. Step 5: Solve for x
    x = 4,557,782,814.50/72,879.20
  6. Step 6: Final answer
    x = 62,538.87

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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.