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Finding the Fourth Proportional to 159,967.12, 220,797.40 and 91,991.56

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Solution

The fourth proportional to 159,967.12, 220,797.40 and 91,991.56 is: 126,972.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,967.12 : 220,797.40 = 91,991.56 : x
  2. Step 2: Convert to fraction form
    159,967.12/220,797.40 = 91,991.56/x
  3. Step 3: Cross multiply
    159,967.12x = 220,797.40 × 91,991.56
  4. Step 4: Simplify right side
    159,967.12x = 20,311,497,269.94
  5. Step 5: Solve for x
    x = 20,311,497,269.94/159,967.12
  6. Step 6: Final answer
    x = 126,972.95

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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.