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Finding the Fourth Proportional to 54,028.66, 81,055.02 and 20,748.82

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Solution

The fourth proportional to 54,028.66, 81,055.02 and 20,748.82 is: 31,127.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,028.66 : 81,055.02 = 20,748.82 : x
  2. Step 2: Convert to fraction form
    54,028.66/81,055.02 = 20,748.82/x
  3. Step 3: Cross multiply
    54,028.66x = 81,055.02 × 20,748.82
  4. Step 4: Simplify right side
    54,028.66x = 1,681,796,020.08
  5. Step 5: Solve for x
    x = 1,681,796,020.08/54,028.66
  6. Step 6: Final answer
    x = 31,127.85

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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.