Home / 90,847.20-136,501.20-80,709.60

Finding the Fourth Proportional to 90,847.20, 136,501.20 and 80,709.60

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Solution

The fourth proportional to 90,847.20, 136,501.20 and 80,709.60 is: 121,269.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,847.20 : 136,501.20 = 80,709.60 : x
  2. Step 2: Convert to fraction form
    90,847.20/136,501.20 = 80,709.60/x
  3. Step 3: Cross multiply
    90,847.20x = 136,501.20 × 80,709.60
  4. Step 4: Simplify right side
    90,847.20x = 11,016,957,251.52
  5. Step 5: Solve for x
    x = 11,016,957,251.52/90,847.20
  6. Step 6: Final answer
    x = 121,269.09

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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.