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Finding the Fourth Proportional to 45,195.30, 67,780.80 and 18,894.60

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Solution

The fourth proportional to 45,195.30, 67,780.80 and 18,894.60 is: 28,336.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,195.30 : 67,780.80 = 18,894.60 : x
  2. Step 2: Convert to fraction form
    45,195.30/67,780.80 = 18,894.60/x
  3. Step 3: Cross multiply
    45,195.30x = 67,780.80 × 18,894.60
  4. Step 4: Simplify right side
    45,195.30x = 1,280,691,103.68
  5. Step 5: Solve for x
    x = 1,280,691,103.68/45,195.30
  6. Step 6: Final answer
    x = 28,336.82

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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.