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Finding the Fourth Proportional to 159,694.07, 220,368.30 and 91,722.11

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Solution

The fourth proportional to 159,694.07, 220,368.30 and 91,722.11 is: 126,571.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,694.07 : 220,368.30 = 91,722.11 : x
  2. Step 2: Convert to fraction form
    159,694.07/220,368.30 = 91,722.11/x
  3. Step 3: Cross multiply
    159,694.07x = 220,368.30 × 91,722.11
  4. Step 4: Simplify right side
    159,694.07x = 20,212,644,007.31
  5. Step 5: Solve for x
    x = 20,212,644,007.31/159,694.07
  6. Step 6: Final answer
    x = 126,571.04

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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.