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Finding the Fourth Proportional to 54,361.60, 81,542.40 and 45,145.60

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Solution

The fourth proportional to 54,361.60, 81,542.40 and 45,145.60 is: 67,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,361.60 : 81,542.40 = 45,145.60 : x
  2. Step 2: Convert to fraction form
    54,361.60/81,542.40 = 45,145.60/x
  3. Step 3: Cross multiply
    54,361.60x = 81,542.40 × 45,145.60
  4. Step 4: Simplify right side
    54,361.60x = 3,681,280,573.44
  5. Step 5: Solve for x
    x = 3,681,280,573.44/54,361.60
  6. Step 6: Final answer
    x = 67,718.40

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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.