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Finding the Fourth Proportional to 86,889.67, 119,909.57 and 49,163.92

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Solution

The fourth proportional to 86,889.67, 119,909.57 and 49,163.92 is: 67,847.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,889.67 : 119,909.57 = 49,163.92 : x
  2. Step 2: Convert to fraction form
    86,889.67/119,909.57 = 49,163.92/x
  3. Step 3: Cross multiply
    86,889.67x = 119,909.57 × 49,163.92
  4. Step 4: Simplify right side
    86,889.67x = 5,895,223,961.12
  5. Step 5: Solve for x
    x = 5,895,223,961.12/86,889.67
  6. Step 6: Final answer
    x = 67,847.24

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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.