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Finding the Fourth Proportional to 80,075.91, 120,122.07 and 27,478.56

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Solution

The fourth proportional to 80,075.91, 120,122.07 and 27,478.56 is: 41,220.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,075.91 : 120,122.07 = 27,478.56 : x
  2. Step 2: Convert to fraction form
    80,075.91/120,122.07 = 27,478.56/x
  3. Step 3: Cross multiply
    80,075.91x = 120,122.07 × 27,478.56
  4. Step 4: Simplify right side
    80,075.91x = 3,300,781,507.82
  5. Step 5: Solve for x
    x = 3,300,781,507.82/80,075.91
  6. Step 6: Final answer
    x = 41,220.66

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1.5x scale

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.