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Finding the Fourth Proportional to 86,074.89, 128,872.83 and 43,863.96

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Solution

The fourth proportional to 86,074.89, 128,872.83 and 43,863.96 is: 65,673.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,074.89 : 128,872.83 = 43,863.96 : x
  2. Step 2: Convert to fraction form
    86,074.89/128,872.83 = 43,863.96/x
  3. Step 3: Cross multiply
    86,074.89x = 128,872.83 × 43,863.96
  4. Step 4: Simplify right side
    86,074.89x = 5,652,872,660.21
  5. Step 5: Solve for x
    x = 5,652,872,660.21/86,074.89
  6. Step 6: Final answer
    x = 65,673.89

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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.