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Finding the Fourth Proportional to 72,198.95, 108,290.13 and 18,896.09

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Solution

The fourth proportional to 72,198.95, 108,290.13 and 18,896.09 is: 28,341.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,198.95 : 108,290.13 = 18,896.09 : x
  2. Step 2: Convert to fraction form
    72,198.95/108,290.13 = 18,896.09/x
  3. Step 3: Cross multiply
    72,198.95x = 108,290.13 × 18,896.09
  4. Step 4: Simplify right side
    72,198.95x = 2,046,260,042.59
  5. Step 5: Solve for x
    x = 2,046,260,042.59/72,198.95
  6. Step 6: Final answer
    x = 28,341.96

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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.