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Finding the Fourth Proportional to 65,804.43, 90,727.72 and 54,918.18

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Solution

The fourth proportional to 65,804.43, 90,727.72 and 54,918.18 is: 75,718.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,804.43 : 90,727.72 = 54,918.18 : x
  2. Step 2: Convert to fraction form
    65,804.43/90,727.72 = 54,918.18/x
  3. Step 3: Cross multiply
    65,804.43x = 90,727.72 × 54,918.18
  4. Step 4: Simplify right side
    65,804.43x = 4,982,601,257.95
  5. Step 5: Solve for x
    x = 4,982,601,257.95/65,804.43
  6. Step 6: Final answer
    x = 75,718.33

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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.