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Finding the Fourth Proportional to 80,573.80, 120,860.70 and 71,588.20

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Solution

The fourth proportional to 80,573.80, 120,860.70 and 71,588.20 is: 107,382.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,573.80 : 120,860.70 = 71,588.20 : x
  2. Step 2: Convert to fraction form
    80,573.80/120,860.70 = 71,588.20/x
  3. Step 3: Cross multiply
    80,573.80x = 120,860.70 × 71,588.20
  4. Step 4: Simplify right side
    80,573.80x = 8,652,199,963.74
  5. Step 5: Solve for x
    x = 8,652,199,963.74/80,573.80
  6. Step 6: Final answer
    x = 107,382.30

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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.