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Finding the Fourth Proportional to 76,163.67, 105,105.78 and 42,629.67

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Solution

The fourth proportional to 76,163.67, 105,105.78 and 42,629.67 is: 58,828.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,163.67 : 105,105.78 = 42,629.67 : x
  2. Step 2: Convert to fraction form
    76,163.67/105,105.78 = 42,629.67/x
  3. Step 3: Cross multiply
    76,163.67x = 105,105.78 × 42,629.67
  4. Step 4: Simplify right side
    76,163.67x = 4,480,624,716.49
  5. Step 5: Solve for x
    x = 4,480,624,716.49/76,163.67
  6. Step 6: Final answer
    x = 58,828.90

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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.