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Finding the Fourth Proportional to 54,270.40, 81,405.60 and 40,964.80

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Solution

The fourth proportional to 54,270.40, 81,405.60 and 40,964.80 is: 61,447.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,270.40 : 81,405.60 = 40,964.80 : x
  2. Step 2: Convert to fraction form
    54,270.40/81,405.60 = 40,964.80/x
  3. Step 3: Cross multiply
    54,270.40x = 81,405.60 × 40,964.80
  4. Step 4: Simplify right side
    54,270.40x = 3,334,764,122.88
  5. Step 5: Solve for x
    x = 3,334,764,122.88/54,270.40
  6. Step 6: Final answer
    x = 61,447.20

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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.