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Finding the Fourth Proportional to 71,081.57, 106,622.49 and 18,490.97

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Solution

The fourth proportional to 71,081.57, 106,622.49 and 18,490.97 is: 27,736.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,081.57 : 106,622.49 = 18,490.97 : x
  2. Step 2: Convert to fraction form
    71,081.57/106,622.49 = 18,490.97/x
  3. Step 3: Cross multiply
    71,081.57x = 106,622.49 × 18,490.97
  4. Step 4: Simplify right side
    71,081.57x = 1,971,552,730.80
  5. Step 5: Solve for x
    x = 1,971,552,730.80/71,081.57
  6. Step 6: Final answer
    x = 27,736.48

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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.