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Finding the Fourth Proportional to 72,910.35, 109,146.83 and 68,584.95

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Solution

The fourth proportional to 72,910.35, 109,146.83 and 68,584.95 is: 102,671.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,910.35 : 109,146.83 = 68,584.95 : x
  2. Step 2: Convert to fraction form
    72,910.35/109,146.83 = 68,584.95/x
  3. Step 3: Cross multiply
    72,910.35x = 109,146.83 × 68,584.95
  4. Step 4: Simplify right side
    72,910.35x = 7,485,829,535.28
  5. Step 5: Solve for x
    x = 7,485,829,535.28/72,910.35
  6. Step 6: Final answer
    x = 102,671.70

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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.