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Finding the Fourth Proportional to 87,360.40, 131,040.60 and 21,696.40

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Solution

The fourth proportional to 87,360.40, 131,040.60 and 21,696.40 is: 32,544.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,360.40 : 131,040.60 = 21,696.40 : x
  2. Step 2: Convert to fraction form
    87,360.40/131,040.60 = 21,696.40/x
  3. Step 3: Cross multiply
    87,360.40x = 131,040.60 × 21,696.40
  4. Step 4: Simplify right side
    87,360.40x = 2,843,109,273.84
  5. Step 5: Solve for x
    x = 2,843,109,273.84/87,360.40
  6. Step 6: Final answer
    x = 32,544.60

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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.