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Finding the Fourth Proportional to 67,064.20, 100,609.80 and 19,679.20

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Solution

The fourth proportional to 67,064.20, 100,609.80 and 19,679.20 is: 29,522.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,064.20 : 100,609.80 = 19,679.20 : x
  2. Step 2: Convert to fraction form
    67,064.20/100,609.80 = 19,679.20/x
  3. Step 3: Cross multiply
    67,064.20x = 100,609.80 × 19,679.20
  4. Step 4: Simplify right side
    67,064.20x = 1,979,920,376.16
  5. Step 5: Solve for x
    x = 1,979,920,376.16/67,064.20
  6. Step 6: Final answer
    x = 29,522.76

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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.