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Finding the Fourth Proportional to 72,643.46, 100,207.49 and 67,505.96

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Solution

The fourth proportional to 72,643.46, 100,207.49 and 67,505.96 is: 93,120.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,643.46 : 100,207.49 = 67,505.96 : x
  2. Step 2: Convert to fraction form
    72,643.46/100,207.49 = 67,505.96/x
  3. Step 3: Cross multiply
    72,643.46x = 100,207.49 × 67,505.96
  4. Step 4: Simplify right side
    72,643.46x = 6,764,603,230.92
  5. Step 5: Solve for x
    x = 6,764,603,230.92/72,643.46
  6. Step 6: Final answer
    x = 93,120.62

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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.