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Finding the Fourth Proportional to 72,286.92, 99,747 and 40,447.80

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Solution

The fourth proportional to 72,286.92, 99,747 and 40,447.80 is: 55,812.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,286.92 : 99,747 = 40,447.80 : x
  2. Step 2: Convert to fraction form
    72,286.92/99,747 = 40,447.80/x
  3. Step 3: Cross multiply
    72,286.92x = 99,747 × 40,447.80
  4. Step 4: Simplify right side
    72,286.92x = 4,034,546,706.60
  5. Step 5: Solve for x
    x = 4,034,546,706.60/72,286.92
  6. Step 6: Final answer
    x = 55,812.96

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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.