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Finding the Fourth Proportional to 70,481.58, 105,712.08 and 20,548.26

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Solution

The fourth proportional to 70,481.58, 105,712.08 and 20,548.26 is: 30,819.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,481.58 : 105,712.08 = 20,548.26 : x
  2. Step 2: Convert to fraction form
    70,481.58/105,712.08 = 20,548.26/x
  3. Step 3: Cross multiply
    70,481.58x = 105,712.08 × 20,548.26
  4. Step 4: Simplify right side
    70,481.58x = 2,172,199,304.98
  5. Step 5: Solve for x
    x = 2,172,199,304.98/70,481.58
  6. Step 6: Final answer
    x = 30,819.39

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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.