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Finding the Fourth Proportional to 86,245.70, 129,369.68 and 27,081.34

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Solution

The fourth proportional to 86,245.70, 129,369.68 and 27,081.34 is: 40,622.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,245.70 : 129,369.68 = 27,081.34 : x
  2. Step 2: Convert to fraction form
    86,245.70/129,369.68 = 27,081.34/x
  3. Step 3: Cross multiply
    86,245.70x = 129,369.68 × 27,081.34
  4. Step 4: Simplify right side
    86,245.70x = 3,503,504,289.77
  5. Step 5: Solve for x
    x = 3,503,504,289.77/86,245.70
  6. Step 6: Final answer
    x = 40,622.36

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1.5x scale

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.