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Finding the Fourth Proportional to 291,155.76, 436,733.64 and 80,793.90

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Solution

The fourth proportional to 291,155.76, 436,733.64 and 80,793.90 is: 121,190.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,155.76 : 436,733.64 = 80,793.90 : x
  2. Step 2: Convert to fraction form
    291,155.76/436,733.64 = 80,793.90/x
  3. Step 3: Cross multiply
    291,155.76x = 436,733.64 × 80,793.90
  4. Step 4: Simplify right side
    291,155.76x = 35,285,414,036.80
  5. Step 5: Solve for x
    x = 35,285,414,036.80/291,155.76
  6. Step 6: Final answer
    x = 121,190.85

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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.