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Finding the Fourth Proportional to 91,959.73, 137,865.15 and 28,747.31

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Solution

The fourth proportional to 91,959.73, 137,865.15 and 28,747.31 is: 43,097.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,959.73 : 137,865.15 = 28,747.31 : x
  2. Step 2: Convert to fraction form
    91,959.73/137,865.15 = 28,747.31/x
  3. Step 3: Cross multiply
    91,959.73x = 137,865.15 × 28,747.31
  4. Step 4: Simplify right side
    91,959.73x = 3,963,251,515.92
  5. Step 5: Solve for x
    x = 3,963,251,515.92/91,959.73
  6. Step 6: Final answer
    x = 43,097.69

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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.