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Finding the Fourth Proportional to 57,991,692.80, 87,015,532.80 and 40,915,596.80

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Solution

The fourth proportional to 57,991,692.80, 87,015,532.80 and 40,915,596.80 is: 61,393,145.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,991,692.80 : 87,015,532.80 = 40,915,596.80 : x
  2. Step 2: Convert to fraction form
    57,991,692.80/87,015,532.80 = 40,915,596.80/x
  3. Step 3: Cross multiply
    57,991,692.80x = 87,015,532.80 × 40,915,596.80
  4. Step 4: Simplify right side
    57,991,692.80x = 3,560,292,455,381,974.50
  5. Step 5: Solve for x
    x = 3,560,292,455,381,974.50/57,991,692.80
  6. Step 6: Final answer
    x = 61,393,145.87

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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.