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Finding the Fourth Proportional to 79,620.17, 109,877.31 and 43,809.86

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Solution

The fourth proportional to 79,620.17, 109,877.31 and 43,809.86 is: 60,458.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,620.17 : 109,877.31 = 43,809.86 : x
  2. Step 2: Convert to fraction form
    79,620.17/109,877.31 = 43,809.86/x
  3. Step 3: Cross multiply
    79,620.17x = 109,877.31 × 43,809.86
  4. Step 4: Simplify right side
    79,620.17x = 4,813,709,842.97
  5. Step 5: Solve for x
    x = 4,813,709,842.97/79,620.17
  6. Step 6: Final answer
    x = 60,458.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.