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Finding the Fourth Proportional to 99,486.55, 137,286.93 and 54,163.41

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Solution

The fourth proportional to 99,486.55, 137,286.93 and 54,163.41 is: 74,743.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,486.55 : 137,286.93 = 54,163.41 : x
  2. Step 2: Convert to fraction form
    99,486.55/137,286.93 = 54,163.41/x
  3. Step 3: Cross multiply
    99,486.55x = 137,286.93 × 54,163.41
  4. Step 4: Simplify right side
    99,486.55x = 7,435,928,277.23
  5. Step 5: Solve for x
    x = 7,435,928,277.23/99,486.55
  6. Step 6: Final answer
    x = 74,743.05

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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.