Home / 81,981.92-122,961.20-25,820.57

Finding the Fourth Proportional to 81,981.92, 122,961.20 and 25,820.57

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Solution

The fourth proportional to 81,981.92, 122,961.20 and 25,820.57 is: 38,727.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,981.92 : 122,961.20 = 25,820.57 : x
  2. Step 2: Convert to fraction form
    81,981.92/122,961.20 = 25,820.57/x
  3. Step 3: Cross multiply
    81,981.92x = 122,961.20 × 25,820.57
  4. Step 4: Simplify right side
    81,981.92x = 3,174,927,527.98
  5. Step 5: Solve for x
    x = 3,174,927,527.98/81,981.92
  6. Step 6: Final answer
    x = 38,727.17

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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.