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Finding the Fourth Proportional to 86,523.80, 129,858.60 and 39,211.70

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Solution

The fourth proportional to 86,523.80, 129,858.60 and 39,211.70 is: 58,850.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,523.80 : 129,858.60 = 39,211.70 : x
  2. Step 2: Convert to fraction form
    86,523.80/129,858.60 = 39,211.70/x
  3. Step 3: Cross multiply
    86,523.80x = 129,858.60 × 39,211.70
  4. Step 4: Simplify right side
    86,523.80x = 5,091,976,465.62
  5. Step 5: Solve for x
    x = 5,091,976,465.62/86,523.80
  6. Step 6: Final answer
    x = 58,850.59

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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.