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Finding the Fourth Proportional to 81,232.85, 121,895.85 and 43,792.76

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Solution

The fourth proportional to 81,232.85, 121,895.85 and 43,792.76 is: 65,714.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,232.85 : 121,895.85 = 43,792.76 : x
  2. Step 2: Convert to fraction form
    81,232.85/121,895.85 = 43,792.76/x
  3. Step 3: Cross multiply
    81,232.85x = 121,895.85 × 43,792.76
  4. Step 4: Simplify right side
    81,232.85x = 5,338,155,704.05
  5. Step 5: Solve for x
    x = 5,338,155,704.05/81,232.85
  6. Step 6: Final answer
    x = 65,714.25

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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.