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Finding the Fourth Proportional to 79,319.70, 109,431 and 50,640.44

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Solution

The fourth proportional to 79,319.70, 109,431 and 50,640.44 is: 69,864.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,319.70 : 109,431 = 50,640.44 : x
  2. Step 2: Convert to fraction form
    79,319.70/109,431 = 50,640.44/x
  3. Step 3: Cross multiply
    79,319.70x = 109,431 × 50,640.44
  4. Step 4: Simplify right side
    79,319.70x = 5,541,633,442.49
  5. Step 5: Solve for x
    x = 5,541,633,442.49/79,319.70
  6. Step 6: Final answer
    x = 69,864.53

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1.5x scale

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.