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Finding the Fourth Proportional to 221,238.61, 331,773.10 and 79,057.15

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Solution

The fourth proportional to 221,238.61, 331,773.10 and 79,057.15 is: 118,555.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,238.61 : 331,773.10 = 79,057.15 : x
  2. Step 2: Convert to fraction form
    221,238.61/331,773.10 = 79,057.15/x
  3. Step 3: Cross multiply
    221,238.61x = 331,773.10 × 79,057.15
  4. Step 4: Simplify right side
    221,238.61x = 26,229,034,705.59
  5. Step 5: Solve for x
    x = 26,229,034,705.59/221,238.61
  6. Step 6: Final answer
    x = 118,555.41

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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.