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Finding the Fourth Proportional to 57,378.90, 86,067.90 and 33,988.50

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Solution

The fourth proportional to 57,378.90, 86,067.90 and 33,988.50 is: 50,982.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,378.90 : 86,067.90 = 33,988.50 : x
  2. Step 2: Convert to fraction form
    57,378.90/86,067.90 = 33,988.50/x
  3. Step 3: Cross multiply
    57,378.90x = 86,067.90 × 33,988.50
  4. Step 4: Simplify right side
    57,378.90x = 2,925,318,819.15
  5. Step 5: Solve for x
    x = 2,925,318,819.15/57,378.90
  6. Step 6: Final answer
    x = 50,982.48

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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.