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Finding the Fourth Proportional to 54,571.60, 81,780.60 and 40,421.20

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Solution

The fourth proportional to 54,571.60, 81,780.60 and 40,421.20 is: 60,574.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,571.60 : 81,780.60 = 40,421.20 : x
  2. Step 2: Convert to fraction form
    54,571.60/81,780.60 = 40,421.20/x
  3. Step 3: Cross multiply
    54,571.60x = 81,780.60 × 40,421.20
  4. Step 4: Simplify right side
    54,571.60x = 3,305,669,988.72
  5. Step 5: Solve for x
    x = 3,305,669,988.72/54,571.60
  6. Step 6: Final answer
    x = 60,574.91

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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.