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Finding the Fourth Proportional to 54,620.66, 81,939.64 and 19,559.54

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Solution

The fourth proportional to 54,620.66, 81,939.64 and 19,559.54 is: 29,342.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,620.66 : 81,939.64 = 19,559.54 : x
  2. Step 2: Convert to fraction form
    54,620.66/81,939.64 = 19,559.54/x
  3. Step 3: Cross multiply
    54,620.66x = 81,939.64 × 19,559.54
  4. Step 4: Simplify right side
    54,620.66x = 1,602,701,666.17
  5. Step 5: Solve for x
    x = 1,602,701,666.17/54,620.66
  6. Step 6: Final answer
    x = 29,342.41

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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.