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Finding the Fourth Proportional to 187,371.20, 280,959.60 and 68,981.60

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Solution

The fourth proportional to 187,371.20, 280,959.60 and 68,981.60 is: 103,436.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,371.20 : 280,959.60 = 68,981.60 : x
  2. Step 2: Convert to fraction form
    187,371.20/280,959.60 = 68,981.60/x
  3. Step 3: Cross multiply
    187,371.20x = 280,959.60 × 68,981.60
  4. Step 4: Simplify right side
    187,371.20x = 19,381,042,743.36
  5. Step 5: Solve for x
    x = 19,381,042,743.36/187,371.20
  6. Step 6: Final answer
    x = 103,436.62

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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.