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Finding the Fourth Proportional to 54,579.60, 81,792.60 and 40,429.20

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Solution

The fourth proportional to 54,579.60, 81,792.60 and 40,429.20 is: 60,586.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,579.60 : 81,792.60 = 40,429.20 : x
  2. Step 2: Convert to fraction form
    54,579.60/81,792.60 = 40,429.20/x
  3. Step 3: Cross multiply
    54,579.60x = 81,792.60 × 40,429.20
  4. Step 4: Simplify right side
    54,579.60x = 3,306,809,383.92
  5. Step 5: Solve for x
    x = 3,306,809,383.92/54,579.60
  6. Step 6: Final answer
    x = 60,586.91

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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.