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Finding the Fourth Proportional to 217,793.56, 326,621.22 and 70,015

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Solution

The fourth proportional to 217,793.56, 326,621.22 and 70,015 is: 105,000.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,793.56 : 326,621.22 = 70,015 : x
  2. Step 2: Convert to fraction form
    217,793.56/326,621.22 = 70,015/x
  3. Step 3: Cross multiply
    217,793.56x = 326,621.22 × 70,015
  4. Step 4: Simplify right side
    217,793.56x = 22,868,384,718.30
  5. Step 5: Solve for x
    x = 22,868,384,718.30/217,793.56
  6. Step 6: Final answer
    x = 105,000.28

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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.