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Finding the Fourth Proportional to 80,858.85, 121,310.15 and 45,823.11

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Solution

The fourth proportional to 80,858.85, 121,310.15 and 45,823.11 is: 68,747.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,858.85 : 121,310.15 = 45,823.11 : x
  2. Step 2: Convert to fraction form
    80,858.85/121,310.15 = 45,823.11/x
  3. Step 3: Cross multiply
    80,858.85x = 121,310.15 × 45,823.11
  4. Step 4: Simplify right side
    80,858.85x = 5,558,808,118.45
  5. Step 5: Solve for x
    x = 5,558,808,118.45/80,858.85
  6. Step 6: Final answer
    x = 68,747.06

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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.