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Finding the Fourth Proportional to 67,633.20, 101,464.20 and 20,890.80

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Solution

The fourth proportional to 67,633.20, 101,464.20 and 20,890.80 is: 31,340.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,633.20 : 101,464.20 = 20,890.80 : x
  2. Step 2: Convert to fraction form
    67,633.20/101,464.20 = 20,890.80/x
  3. Step 3: Cross multiply
    67,633.20x = 101,464.20 × 20,890.80
  4. Step 4: Simplify right side
    67,633.20x = 2,119,668,309.36
  5. Step 5: Solve for x
    x = 2,119,668,309.36/67,633.20
  6. Step 6: Final answer
    x = 31,340.65

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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.