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Finding the Fourth Proportional to 91,906.55, 137,761.81 and 52,378.55

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Solution

The fourth proportional to 91,906.55, 137,761.81 and 52,378.55 is: 78,511.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,906.55 : 137,761.81 = 52,378.55 : x
  2. Step 2: Convert to fraction form
    91,906.55/137,761.81 = 52,378.55/x
  3. Step 3: Cross multiply
    91,906.55x = 137,761.81 × 52,378.55
  4. Step 4: Simplify right side
    91,906.55x = 7,215,763,853.18
  5. Step 5: Solve for x
    x = 7,215,763,853.18/91,906.55
  6. Step 6: Final answer
    x = 78,511.97

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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.