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Finding the Fourth Proportional to 80,715.53, 120,968.01 and 50,308.11

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Solution

The fourth proportional to 80,715.53, 120,968.01 and 50,308.11 is: 75,396.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,715.53 : 120,968.01 = 50,308.11 : x
  2. Step 2: Convert to fraction form
    80,715.53/120,968.01 = 50,308.11/x
  3. Step 3: Cross multiply
    80,715.53x = 120,968.01 × 50,308.11
  4. Step 4: Simplify right side
    80,715.53x = 6,085,671,953.56
  5. Step 5: Solve for x
    x = 6,085,671,953.56/80,715.53
  6. Step 6: Final answer
    x = 75,396.54

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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.