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Finding the Fourth Proportional to 67,489.40, 101,234.10 and 20,742.20

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Solution

The fourth proportional to 67,489.40, 101,234.10 and 20,742.20 is: 31,113.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,489.40 : 101,234.10 = 20,742.20 : x
  2. Step 2: Convert to fraction form
    67,489.40/101,234.10 = 20,742.20/x
  3. Step 3: Cross multiply
    67,489.40x = 101,234.10 × 20,742.20
  4. Step 4: Simplify right side
    67,489.40x = 2,099,817,949.02
  5. Step 5: Solve for x
    x = 2,099,817,949.02/67,489.40
  6. Step 6: Final answer
    x = 31,113.30

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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.