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Finding the Fourth Proportional to 81,792.28, 122,688.38 and 26,388.28

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Solution

The fourth proportional to 81,792.28, 122,688.38 and 26,388.28 is: 39,582.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,792.28 : 122,688.38 = 26,388.28 : x
  2. Step 2: Convert to fraction form
    81,792.28/122,688.38 = 26,388.28/x
  3. Step 3: Cross multiply
    81,792.28x = 122,688.38 × 26,388.28
  4. Step 4: Simplify right side
    81,792.28x = 3,237,535,324.19
  5. Step 5: Solve for x
    x = 3,237,535,324.19/81,792.28
  6. Step 6: Final answer
    x = 39,582.41

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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.