Home / 86,735.20-130,016.40-39,906.40

Finding the Fourth Proportional to 86,735.20, 130,016.40 and 39,906.40

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Solution

The fourth proportional to 86,735.20, 130,016.40 and 39,906.40 is: 59,819.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,735.20 : 130,016.40 = 39,906.40 : x
  2. Step 2: Convert to fraction form
    86,735.20/130,016.40 = 39,906.40/x
  3. Step 3: Cross multiply
    86,735.20x = 130,016.40 × 39,906.40
  4. Step 4: Simplify right side
    86,735.20x = 5,188,486,464.96
  5. Step 5: Solve for x
    x = 5,188,486,464.96/86,735.20
  6. Step 6: Final answer
    x = 59,819.85

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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.