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Finding the Fourth Proportional to 308,143.20, 462,214.80 and 108,688.80

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Solution

The fourth proportional to 308,143.20, 462,214.80 and 108,688.80 is: 163,033.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,143.20 : 462,214.80 = 108,688.80 : x
  2. Step 2: Convert to fraction form
    308,143.20/462,214.80 = 108,688.80/x
  3. Step 3: Cross multiply
    308,143.20x = 462,214.80 × 108,688.80
  4. Step 4: Simplify right side
    308,143.20x = 50,237,571,954.24
  5. Step 5: Solve for x
    x = 50,237,571,954.24/308,143.20
  6. Step 6: Final answer
    x = 163,033.20

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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.