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Finding the Fourth Proportional to 99,861, 149,906.70 and 50,716.68

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Solution

The fourth proportional to 99,861, 149,906.70 and 50,716.68 is: 76,133.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,861 : 149,906.70 = 50,716.68 : x
  2. Step 2: Convert to fraction form
    99,861/149,906.70 = 50,716.68/x
  3. Step 3: Cross multiply
    99,861x = 149,906.70 × 50,716.68
  4. Step 4: Simplify right side
    99,861x = 7,602,770,133.76
  5. Step 5: Solve for x
    x = 7,602,770,133.76/99,861
  6. Step 6: Final answer
    x = 76,133.53

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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.