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Finding the Fourth Proportional to 120,900.70, 181,523.85 and 68,412.70

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Solution

The fourth proportional to 120,900.70, 181,523.85 and 68,412.70 is: 102,716.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,900.70 : 181,523.85 = 68,412.70 : x
  2. Step 2: Convert to fraction form
    120,900.70/181,523.85 = 68,412.70/x
  3. Step 3: Cross multiply
    120,900.70x = 181,523.85 × 68,412.70
  4. Step 4: Simplify right side
    120,900.70x = 12,418,536,692.90
  5. Step 5: Solve for x
    x = 12,418,536,692.90/120,900.70
  6. Step 6: Final answer
    x = 102,716.83

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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.