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Finding the Fourth Proportional to 70,310.04, 105,443.34 and 20,393.82

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Solution

The fourth proportional to 70,310.04, 105,443.34 and 20,393.82 is: 30,584.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,310.04 : 105,443.34 = 20,393.82 : x
  2. Step 2: Convert to fraction form
    70,310.04/105,443.34 = 20,393.82/x
  3. Step 3: Cross multiply
    70,310.04x = 105,443.34 × 20,393.82
  4. Step 4: Simplify right side
    70,310.04x = 2,150,392,496.16
  5. Step 5: Solve for x
    x = 2,150,392,496.16/70,310.04
  6. Step 6: Final answer
    x = 30,584.43

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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.