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Finding the Fourth Proportional to 67,266.72, 100,899.80 and 20,519.44

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Solution

The fourth proportional to 67,266.72, 100,899.80 and 20,519.44 is: 30,779.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,266.72 : 100,899.80 = 20,519.44 : x
  2. Step 2: Convert to fraction form
    67,266.72/100,899.80 = 20,519.44/x
  3. Step 3: Cross multiply
    67,266.72x = 100,899.80 × 20,519.44
  4. Step 4: Simplify right side
    67,266.72x = 2,070,407,392.11
  5. Step 5: Solve for x
    x = 2,070,407,392.11/67,266.72
  6. Step 6: Final answer
    x = 30,779.07

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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.