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Finding the Fourth Proportional to 86,771.80, 130,231.59 and 61,872.85

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Solution

The fourth proportional to 86,771.80, 130,231.59 and 61,872.85 is: 92,861.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,771.80 : 130,231.59 = 61,872.85 : x
  2. Step 2: Convert to fraction form
    86,771.80/130,231.59 = 61,872.85/x
  3. Step 3: Cross multiply
    86,771.80x = 130,231.59 × 61,872.85
  4. Step 4: Simplify right side
    86,771.80x = 8,057,799,633.33
  5. Step 5: Solve for x
    x = 8,057,799,633.33/86,771.80
  6. Step 6: Final answer
    x = 92,861.96

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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.