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Finding the Fourth Proportional to 80,692.52, 120,779.96 and 43,158.74

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Solution

The fourth proportional to 80,692.52, 120,779.96 and 43,158.74 is: 64,599.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,692.52 : 120,779.96 = 43,158.74 : x
  2. Step 2: Convert to fraction form
    80,692.52/120,779.96 = 43,158.74/x
  3. Step 3: Cross multiply
    80,692.52x = 120,779.96 × 43,158.74
  4. Step 4: Simplify right side
    80,692.52x = 5,212,710,890.85
  5. Step 5: Solve for x
    x = 5,212,710,890.85/80,692.52
  6. Step 6: Final answer
    x = 64,599.68

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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.