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Finding the Fourth Proportional to 80,349.15, 120,404.93 and 75,855.90

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Solution

The fourth proportional to 80,349.15, 120,404.93 and 75,855.90 is: 113,671.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,349.15 : 120,404.93 = 75,855.90 : x
  2. Step 2: Convert to fraction form
    80,349.15/120,404.93 = 75,855.90/x
  3. Step 3: Cross multiply
    80,349.15x = 120,404.93 × 75,855.90
  4. Step 4: Simplify right side
    80,349.15x = 9,133,424,329.59
  5. Step 5: Solve for x
    x = 9,133,424,329.59/80,349.15
  6. Step 6: Final answer
    x = 113,671.70

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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.