Home / 80,566.43-120,840.08-21,406.65

Finding the Fourth Proportional to 80,566.43, 120,840.08 and 21,406.65

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Solution

The fourth proportional to 80,566.43, 120,840.08 and 21,406.65 is: 32,107.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,566.43 : 120,840.08 = 21,406.65 : x
  2. Step 2: Convert to fraction form
    80,566.43/120,840.08 = 21,406.65/x
  3. Step 3: Cross multiply
    80,566.43x = 120,840.08 × 21,406.65
  4. Step 4: Simplify right side
    80,566.43x = 2,586,781,191.50
  5. Step 5: Solve for x
    x = 2,586,781,191.50/80,566.43
  6. Step 6: Final answer
    x = 32,107.43

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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.