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Finding the Fourth Proportional to 79,446.40, 109,635.78 and 43,638.64

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Solution

The fourth proportional to 79,446.40, 109,635.78 and 43,638.64 is: 60,221.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,446.40 : 109,635.78 = 43,638.64 : x
  2. Step 2: Convert to fraction form
    79,446.40/109,635.78 = 43,638.64/x
  3. Step 3: Cross multiply
    79,446.40x = 109,635.78 × 43,638.64
  4. Step 4: Simplify right side
    79,446.40x = 4,784,356,334.54
  5. Step 5: Solve for x
    x = 4,784,356,334.54/79,446.40
  6. Step 6: Final answer
    x = 60,221.18

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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.