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Finding the Fourth Proportional to 80,260.94, 120,509.30 and 78,843.49

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Solution

The fourth proportional to 80,260.94, 120,509.30 and 78,843.49 is: 118,381.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,260.94 : 120,509.30 = 78,843.49 : x
  2. Step 2: Convert to fraction form
    80,260.94/120,509.30 = 78,843.49/x
  3. Step 3: Cross multiply
    80,260.94x = 120,509.30 × 78,843.49
  4. Step 4: Simplify right side
    80,260.94x = 9,501,373,789.46
  5. Step 5: Solve for x
    x = 9,501,373,789.46/80,260.94
  6. Step 6: Final answer
    x = 118,381.04

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1.5x scale

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.