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Finding the Fourth Proportional to 79,123.80, 109,190.12 and 43,313.70

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Solution

The fourth proportional to 79,123.80, 109,190.12 and 43,313.70 is: 59,772.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,123.80 : 109,190.12 = 43,313.70 : x
  2. Step 2: Convert to fraction form
    79,123.80/109,190.12 = 43,313.70/x
  3. Step 3: Cross multiply
    79,123.80x = 109,190.12 × 43,313.70
  4. Step 4: Simplify right side
    79,123.80x = 4,729,427,884.08
  5. Step 5: Solve for x
    x = 4,729,427,884.08/79,123.80
  6. Step 6: Final answer
    x = 59,772.51

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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.