Home / 128,481.05-192,739.91-39,741.50

Finding the Fourth Proportional to 128,481.05, 192,739.91 and 39,741.50

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Solution

The fourth proportional to 128,481.05, 192,739.91 and 39,741.50 is: 59,617.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,481.05 : 192,739.91 = 39,741.50 : x
  2. Step 2: Convert to fraction form
    128,481.05/192,739.91 = 39,741.50/x
  3. Step 3: Cross multiply
    128,481.05x = 192,739.91 × 39,741.50
  4. Step 4: Simplify right side
    128,481.05x = 7,659,773,416.41
  5. Step 5: Solve for x
    x = 7,659,773,416.41/128,481.05
  6. Step 6: Final answer
    x = 59,617.92

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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.