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Finding the Fourth Proportional to 67,221.68, 100,835.30 and 19,836.77

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Solution

The fourth proportional to 67,221.68, 100,835.30 and 19,836.77 is: 29,755.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,221.68 : 100,835.30 = 19,836.77 : x
  2. Step 2: Convert to fraction form
    67,221.68/100,835.30 = 19,836.77/x
  3. Step 3: Cross multiply
    67,221.68x = 100,835.30 × 19,836.77
  4. Step 4: Simplify right side
    67,221.68x = 2,000,246,653.98
  5. Step 5: Solve for x
    x = 2,000,246,653.98/67,221.68
  6. Step 6: Final answer
    x = 29,755.98

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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.