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Finding the Fourth Proportional to 91,813.81, 137,721.32 and 25,260.97

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Solution

The fourth proportional to 91,813.81, 137,721.32 and 25,260.97 is: 37,891.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,813.81 : 137,721.32 = 25,260.97 : x
  2. Step 2: Convert to fraction form
    91,813.81/137,721.32 = 25,260.97/x
  3. Step 3: Cross multiply
    91,813.81x = 137,721.32 × 25,260.97
  4. Step 4: Simplify right side
    91,813.81x = 3,478,973,317.97
  5. Step 5: Solve for x
    x = 3,478,973,317.97/91,813.81
  6. Step 6: Final answer
    x = 37,891.61

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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.