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Finding the Fourth Proportional to 54,789.60, 75,541.12 and 45,728

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Solution

The fourth proportional to 54,789.60, 75,541.12 and 45,728 is: 63,047.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,789.60 : 75,541.12 = 45,728 : x
  2. Step 2: Convert to fraction form
    54,789.60/75,541.12 = 45,728/x
  3. Step 3: Cross multiply
    54,789.60x = 75,541.12 × 45,728
  4. Step 4: Simplify right side
    54,789.60x = 3,454,344,335.36
  5. Step 5: Solve for x
    x = 3,454,344,335.36/54,789.60
  6. Step 6: Final answer
    x = 63,047.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.