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Finding the Fourth Proportional to 67,676.96, 101,515.12 and 45,140

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Solution

The fourth proportional to 67,676.96, 101,515.12 and 45,140 is: 67,709.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,676.96 : 101,515.12 = 45,140 : x
  2. Step 2: Convert to fraction form
    67,676.96/101,515.12 = 45,140/x
  3. Step 3: Cross multiply
    67,676.96x = 101,515.12 × 45,140
  4. Step 4: Simplify right side
    67,676.96x = 4,582,392,516.80
  5. Step 5: Solve for x
    x = 4,582,392,516.80/67,676.96
  6. Step 6: Final answer
    x = 67,709.79

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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.