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Finding the Fourth Proportional to 79,440.78, 109,633.65 and 43,631.16

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Solution

The fourth proportional to 79,440.78, 109,633.65 and 43,631.16 is: 60,213.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,440.78 : 109,633.65 = 43,631.16 : x
  2. Step 2: Convert to fraction form
    79,440.78/109,633.65 = 43,631.16/x
  3. Step 3: Cross multiply
    79,440.78x = 109,633.65 × 43,631.16
  4. Step 4: Simplify right side
    79,440.78x = 4,783,443,324.53
  5. Step 5: Solve for x
    x = 4,783,443,324.53/79,440.78
  6. Step 6: Final answer
    x = 60,213.95

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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.