Home / 205,812.20-308,718.30-72,696.80

Finding the Fourth Proportional to 205,812.20, 308,718.30 and 72,696.80

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Solution

The fourth proportional to 205,812.20, 308,718.30 and 72,696.80 is: 109,045.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,812.20 : 308,718.30 = 72,696.80 : x
  2. Step 2: Convert to fraction form
    205,812.20/308,718.30 = 72,696.80/x
  3. Step 3: Cross multiply
    205,812.20x = 308,718.30 × 72,696.80
  4. Step 4: Simplify right side
    205,812.20x = 22,442,832,511.44
  5. Step 5: Solve for x
    x = 22,442,832,511.44/205,812.20
  6. Step 6: Final answer
    x = 109,045.20

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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.