Home / 80,735.62-121,104.11-28,145.02

Finding the Fourth Proportional to 80,735.62, 121,104.11 and 28,145.02

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Solution

The fourth proportional to 80,735.62, 121,104.11 and 28,145.02 is: 42,217.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,735.62 : 121,104.11 = 28,145.02 : x
  2. Step 2: Convert to fraction form
    80,735.62/121,104.11 = 28,145.02/x
  3. Step 3: Cross multiply
    80,735.62x = 121,104.11 × 28,145.02
  4. Step 4: Simplify right side
    80,735.62x = 3,408,477,598.03
  5. Step 5: Solve for x
    x = 3,408,477,598.03/80,735.62
  6. Step 6: Final answer
    x = 42,217.77

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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.