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Finding the Fourth Proportional to 80,003.80, 120,005.70 and 76,115.80

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Solution

The fourth proportional to 80,003.80, 120,005.70 and 76,115.80 is: 114,173.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,003.80 : 120,005.70 = 76,115.80 : x
  2. Step 2: Convert to fraction form
    80,003.80/120,005.70 = 76,115.80/x
  3. Step 3: Cross multiply
    80,003.80x = 120,005.70 × 76,115.80
  4. Step 4: Simplify right side
    80,003.80x = 9,134,329,860.06
  5. Step 5: Solve for x
    x = 9,134,329,860.06/80,003.80
  6. Step 6: Final answer
    x = 114,173.70

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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.