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Finding the Fourth Proportional to 54,739.20, 81,955.20 and 53,203.20

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Solution

The fourth proportional to 54,739.20, 81,955.20 and 53,203.20 is: 79,655.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,739.20 : 81,955.20 = 53,203.20 : x
  2. Step 2: Convert to fraction form
    54,739.20/81,955.20 = 53,203.20/x
  3. Step 3: Cross multiply
    54,739.20x = 81,955.20 × 53,203.20
  4. Step 4: Simplify right side
    54,739.20x = 4,360,278,896.64
  5. Step 5: Solve for x
    x = 4,360,278,896.64/54,739.20
  6. Step 6: Final answer
    x = 79,655.51

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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.