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Finding the Fourth Proportional to 70,843.57, 106,279.36 and 20,243.05

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Solution

The fourth proportional to 70,843.57, 106,279.36 and 20,243.05 is: 30,368.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,843.57 : 106,279.36 = 20,243.05 : x
  2. Step 2: Convert to fraction form
    70,843.57/106,279.36 = 20,243.05/x
  3. Step 3: Cross multiply
    70,843.57x = 106,279.36 × 20,243.05
  4. Step 4: Simplify right side
    70,843.57x = 2,151,418,300.98
  5. Step 5: Solve for x
    x = 2,151,418,300.98/70,843.57
  6. Step 6: Final answer
    x = 30,368.58

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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.