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Finding the Fourth Proportional to 204,428.80, 306,643.20 and 125,696.80

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Solution

The fourth proportional to 204,428.80, 306,643.20 and 125,696.80 is: 188,545.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,428.80 : 306,643.20 = 125,696.80 : x
  2. Step 2: Convert to fraction form
    204,428.80/306,643.20 = 125,696.80/x
  3. Step 3: Cross multiply
    204,428.80x = 306,643.20 × 125,696.80
  4. Step 4: Simplify right side
    204,428.80x = 38,544,068,981.76
  5. Step 5: Solve for x
    x = 38,544,068,981.76/204,428.80
  6. Step 6: Final answer
    x = 188,545.20

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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.