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Finding the Fourth Proportional to 80,979.93, 111,694.43 and 70,205.56

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Solution

The fourth proportional to 80,979.93, 111,694.43 and 70,205.56 is: 96,833.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,979.93 : 111,694.43 = 70,205.56 : x
  2. Step 2: Convert to fraction form
    80,979.93/111,694.43 = 70,205.56/x
  3. Step 3: Cross multiply
    80,979.93x = 111,694.43 × 70,205.56
  4. Step 4: Simplify right side
    80,979.93x = 7,841,569,903.31
  5. Step 5: Solve for x
    x = 7,841,569,903.31/80,979.93
  6. Step 6: Final answer
    x = 96,833.50

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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.