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Finding the Fourth Proportional to 80,382.58, 120,573.87 and 21,223.01

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Solution

The fourth proportional to 80,382.58, 120,573.87 and 21,223.01 is: 31,834.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,382.58 : 120,573.87 = 21,223.01 : x
  2. Step 2: Convert to fraction form
    80,382.58/120,573.87 = 21,223.01/x
  3. Step 3: Cross multiply
    80,382.58x = 120,573.87 × 21,223.01
  4. Step 4: Simplify right side
    80,382.58x = 2,558,940,670.60
  5. Step 5: Solve for x
    x = 2,558,940,670.60/80,382.58
  6. Step 6: Final answer
    x = 31,834.52

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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.