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Finding the Fourth Proportional to 79,194.48, 109,288.42 and 43,385.78

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Solution

The fourth proportional to 79,194.48, 109,288.42 and 43,385.78 is: 59,872.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,194.48 : 109,288.42 = 43,385.78 : x
  2. Step 2: Convert to fraction form
    79,194.48/109,288.42 = 43,385.78/x
  3. Step 3: Cross multiply
    79,194.48x = 109,288.42 × 43,385.78
  4. Step 4: Simplify right side
    79,194.48x = 4,741,563,346.67
  5. Step 5: Solve for x
    x = 4,741,563,346.67/79,194.48
  6. Step 6: Final answer
    x = 59,872.40

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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.