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Finding the Fourth Proportional to 100,771.79, 151,183.65 and 72,341.70

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Solution

The fourth proportional to 100,771.79, 151,183.65 and 72,341.70 is: 108,531.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,771.79 : 151,183.65 = 72,341.70 : x
  2. Step 2: Convert to fraction form
    100,771.79/151,183.65 = 72,341.70/x
  3. Step 3: Cross multiply
    100,771.79x = 151,183.65 × 72,341.70
  4. Step 4: Simplify right side
    100,771.79x = 10,936,882,524.49
  5. Step 5: Solve for x
    x = 10,936,882,524.49/100,771.79
  6. Step 6: Final answer
    x = 108,531.19

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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.