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Finding the Fourth Proportional to 280,692.88, 420,755.64 and 120,873.04

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Solution

The fourth proportional to 280,692.88, 420,755.64 and 120,873.04 is: 181,187.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,692.88 : 420,755.64 = 120,873.04 : x
  2. Step 2: Convert to fraction form
    280,692.88/420,755.64 = 120,873.04/x
  3. Step 3: Cross multiply
    280,692.88x = 420,755.64 × 120,873.04
  4. Step 4: Simplify right side
    280,692.88x = 50,858,013,303.95
  5. Step 5: Solve for x
    x = 50,858,013,303.95/280,692.88
  6. Step 6: Final answer
    x = 181,187.40

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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.