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Finding the Fourth Proportional to 67,246.80, 100,859.40 and 20,488.80

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Solution

The fourth proportional to 67,246.80, 100,859.40 and 20,488.80 is: 30,729.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,246.80 : 100,859.40 = 20,488.80 : x
  2. Step 2: Convert to fraction form
    67,246.80/100,859.40 = 20,488.80/x
  3. Step 3: Cross multiply
    67,246.80x = 100,859.40 × 20,488.80
  4. Step 4: Simplify right side
    67,246.80x = 2,066,488,074.72
  5. Step 5: Solve for x
    x = 2,066,488,074.72/67,246.80
  6. Step 6: Final answer
    x = 30,729.91

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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.