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Finding the Fourth Proportional to 70,581.68, 105,914.64 and 28,481.92

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Solution

The fourth proportional to 70,581.68, 105,914.64 and 28,481.92 is: 42,739.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,581.68 : 105,914.64 = 28,481.92 : x
  2. Step 2: Convert to fraction form
    70,581.68/105,914.64 = 28,481.92/x
  3. Step 3: Cross multiply
    70,581.68x = 105,914.64 × 28,481.92
  4. Step 4: Simplify right side
    70,581.68x = 3,016,652,303.31
  5. Step 5: Solve for x
    x = 3,016,652,303.31/70,581.68
  6. Step 6: Final answer
    x = 42,739.88

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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.