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Finding the Fourth Proportional to 45,404.70, 68,107.05 and 20,456.70

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Solution

The fourth proportional to 45,404.70, 68,107.05 and 20,456.70 is: 30,685.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,404.70 : 68,107.05 = 20,456.70 : x
  2. Step 2: Convert to fraction form
    45,404.70/68,107.05 = 20,456.70/x
  3. Step 3: Cross multiply
    45,404.70x = 68,107.05 × 20,456.70
  4. Step 4: Simplify right side
    45,404.70x = 1,393,245,489.74
  5. Step 5: Solve for x
    x = 1,393,245,489.74/45,404.70
  6. Step 6: Final answer
    x = 30,685.05

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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.