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Finding the Fourth Proportional to 70,231.76, 96,919.92 and 40,015.76

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Solution

The fourth proportional to 70,231.76, 96,919.92 and 40,015.76 is: 55,221.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,231.76 : 96,919.92 = 40,015.76 : x
  2. Step 2: Convert to fraction form
    70,231.76/96,919.92 = 40,015.76/x
  3. Step 3: Cross multiply
    70,231.76x = 96,919.92 × 40,015.76
  4. Step 4: Simplify right side
    70,231.76x = 3,878,324,257.94
  5. Step 5: Solve for x
    x = 3,878,324,257.94/70,231.76
  6. Step 6: Final answer
    x = 55,221.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.