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Finding the Fourth Proportional to 81,246.87, 121,881.87 and 25,091.64

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Solution

The fourth proportional to 81,246.87, 121,881.87 and 25,091.64 is: 37,641.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,246.87 : 121,881.87 = 25,091.64 : x
  2. Step 2: Convert to fraction form
    81,246.87/121,881.87 = 25,091.64/x
  3. Step 3: Cross multiply
    81,246.87x = 121,881.87 × 25,091.64
  4. Step 4: Simplify right side
    81,246.87x = 3,058,216,004.57
  5. Step 5: Solve for x
    x = 3,058,216,004.57/81,246.87
  6. Step 6: Final answer
    x = 37,641.03

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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.