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Finding the Fourth Proportional to 70,358.96, 105,558.17 and 28,268.60

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Solution

The fourth proportional to 70,358.96, 105,558.17 and 28,268.60 is: 42,410.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,358.96 : 105,558.17 = 28,268.60 : x
  2. Step 2: Convert to fraction form
    70,358.96/105,558.17 = 28,268.60/x
  3. Step 3: Cross multiply
    70,358.96x = 105,558.17 × 28,268.60
  4. Step 4: Simplify right side
    70,358.96x = 2,983,981,015.33
  5. Step 5: Solve for x
    x = 2,983,981,015.33/70,358.96
  6. Step 6: Final answer
    x = 42,410.82

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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.