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Finding the Fourth Proportional to 104,074.42, 155,948.11 and 80,439.82

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Solution

The fourth proportional to 104,074.42, 155,948.11 and 80,439.82 is: 120,533.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,074.42 : 155,948.11 = 80,439.82 : x
  2. Step 2: Convert to fraction form
    104,074.42/155,948.11 = 80,439.82/x
  3. Step 3: Cross multiply
    104,074.42x = 155,948.11 × 80,439.82
  4. Step 4: Simplify right side
    104,074.42x = 12,544,438,190.91
  5. Step 5: Solve for x
    x = 12,544,438,190.91/104,074.42
  6. Step 6: Final answer
    x = 120,533.35

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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.