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Finding the Fourth Proportional to 72,679.10, 100,299.20 and 40,850.96

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Solution

The fourth proportional to 72,679.10, 100,299.20 and 40,850.96 is: 56,375.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,679.10 : 100,299.20 = 40,850.96 : x
  2. Step 2: Convert to fraction form
    72,679.10/100,299.20 = 40,850.96/x
  3. Step 3: Cross multiply
    72,679.10x = 100,299.20 × 40,850.96
  4. Step 4: Simplify right side
    72,679.10x = 4,097,317,901.48
  5. Step 5: Solve for x
    x = 4,097,317,901.48/72,679.10
  6. Step 6: Final answer
    x = 56,375.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.