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Finding the Fourth Proportional to 72,692.15, 109,065.57 and 25,310.79

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Solution

The fourth proportional to 72,692.15, 109,065.57 and 25,310.79 is: 37,975.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,692.15 : 109,065.57 = 25,310.79 : x
  2. Step 2: Convert to fraction form
    72,692.15/109,065.57 = 25,310.79/x
  3. Step 3: Cross multiply
    72,692.15x = 109,065.57 × 25,310.79
  4. Step 4: Simplify right side
    72,692.15x = 2,760,535,611.95
  5. Step 5: Solve for x
    x = 2,760,535,611.95/72,692.15
  6. Step 6: Final answer
    x = 37,975.71

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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.