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Finding the Fourth Proportional to 80,455.80, 120,741.30 and 45,358.20

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Solution

The fourth proportional to 80,455.80, 120,741.30 and 45,358.20 is: 68,069.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,455.80 : 120,741.30 = 45,358.20 : x
  2. Step 2: Convert to fraction form
    80,455.80/120,741.30 = 45,358.20/x
  3. Step 3: Cross multiply
    80,455.80x = 120,741.30 × 45,358.20
  4. Step 4: Simplify right side
    80,455.80x = 5,476,608,033.66
  5. Step 5: Solve for x
    x = 5,476,608,033.66/80,455.80
  6. Step 6: Final answer
    x = 68,069.77

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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.