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Finding the Fourth Proportional to 81,673.92, 122,596.74 and 72,373.50

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Solution

The fourth proportional to 81,673.92, 122,596.74 and 72,373.50 is: 108,636.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,673.92 : 122,596.74 = 72,373.50 : x
  2. Step 2: Convert to fraction form
    81,673.92/122,596.74 = 72,373.50/x
  3. Step 3: Cross multiply
    81,673.92x = 122,596.74 × 72,373.50
  4. Step 4: Simplify right side
    81,673.92x = 8,872,755,162.39
  5. Step 5: Solve for x
    x = 8,872,755,162.39/81,673.92
  6. Step 6: Final answer
    x = 108,636.33

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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.