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Finding the Fourth Proportional to 103,876.89, 155,759.90 and 53,906.67

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Solution

The fourth proportional to 103,876.89, 155,759.90 and 53,906.67 is: 80,831.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,876.89 : 155,759.90 = 53,906.67 : x
  2. Step 2: Convert to fraction form
    103,876.89/155,759.90 = 53,906.67/x
  3. Step 3: Cross multiply
    103,876.89x = 155,759.90 × 53,906.67
  4. Step 4: Simplify right side
    103,876.89x = 8,396,497,259.00
  5. Step 5: Solve for x
    x = 8,396,497,259.00/103,876.89
  6. Step 6: Final answer
    x = 80,831.24

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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.