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Finding the Fourth Proportional to 67,105.80, 100,658.94 and 20,359.08

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Solution

The fourth proportional to 67,105.80, 100,658.94 and 20,359.08 is: 30,538.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,105.80 : 100,658.94 = 20,359.08 : x
  2. Step 2: Convert to fraction form
    67,105.80/100,658.94 = 20,359.08/x
  3. Step 3: Cross multiply
    67,105.80x = 100,658.94 × 20,359.08
  4. Step 4: Simplify right side
    67,105.80x = 2,049,323,412.18
  5. Step 5: Solve for x
    x = 2,049,323,412.18/67,105.80
  6. Step 6: Final answer
    x = 30,538.69

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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.