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Finding the Fourth Proportional to 67,322.40, 100,979.92 and 20,571.63

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Solution

The fourth proportional to 67,322.40, 100,979.92 and 20,571.63 is: 30,856.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,322.40 : 100,979.92 = 20,571.63 : x
  2. Step 2: Convert to fraction form
    67,322.40/100,979.92 = 20,571.63/x
  3. Step 3: Cross multiply
    67,322.40x = 100,979.92 × 20,571.63
  4. Step 4: Simplify right side
    67,322.40x = 2,077,321,551.67
  5. Step 5: Solve for x
    x = 2,077,321,551.67/67,322.40
  6. Step 6: Final answer
    x = 30,856.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.