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Finding the Fourth Proportional to 86,299.11, 128,843.30 and 73,016.73

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Solution

The fourth proportional to 86,299.11, 128,843.30 and 73,016.73 is: 109,012.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,299.11 : 128,843.30 = 73,016.73 : x
  2. Step 2: Convert to fraction form
    86,299.11/128,843.30 = 73,016.73/x
  3. Step 3: Cross multiply
    86,299.11x = 128,843.30 × 73,016.73
  4. Step 4: Simplify right side
    86,299.11x = 9,407,716,630.95
  5. Step 5: Solve for x
    x = 9,407,716,630.95/86,299.11
  6. Step 6: Final answer
    x = 109,012.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.