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Finding the Fourth Proportional to 67,308.20, 100,961.40 and 20,561.30

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Solution

The fourth proportional to 67,308.20, 100,961.40 and 20,561.30 is: 30,841.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,308.20 : 100,961.40 = 20,561.30 : x
  2. Step 2: Convert to fraction form
    67,308.20/100,961.40 = 20,561.30/x
  3. Step 3: Cross multiply
    67,308.20x = 100,961.40 × 20,561.30
  4. Step 4: Simplify right side
    67,308.20x = 2,075,897,633.82
  5. Step 5: Solve for x
    x = 2,075,897,633.82/67,308.20
  6. Step 6: Final answer
    x = 30,841.68

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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.