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Finding the Fourth Proportional to 54,939.72, 75,804.21 and 31,061.19

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Solution

The fourth proportional to 54,939.72, 75,804.21 and 31,061.19 is: 42,857.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,939.72 : 75,804.21 = 31,061.19 : x
  2. Step 2: Convert to fraction form
    54,939.72/75,804.21 = 31,061.19/x
  3. Step 3: Cross multiply
    54,939.72x = 75,804.21 × 31,061.19
  4. Step 4: Simplify right side
    54,939.72x = 2,354,568,969.61
  5. Step 5: Solve for x
    x = 2,354,568,969.61/54,939.72
  6. Step 6: Final answer
    x = 42,857.32

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