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Finding the Fourth Proportional to 70,247.56, 105,371.45 and 28,694.56

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Solution

The fourth proportional to 70,247.56, 105,371.45 and 28,694.56 is: 43,041.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,247.56 : 105,371.45 = 28,694.56 : x
  2. Step 2: Convert to fraction form
    70,247.56/105,371.45 = 28,694.56/x
  3. Step 3: Cross multiply
    70,247.56x = 105,371.45 × 28,694.56
  4. Step 4: Simplify right side
    70,247.56x = 3,023,587,394.31
  5. Step 5: Solve for x
    x = 3,023,587,394.31/70,247.56
  6. Step 6: Final answer
    x = 43,041.88

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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.