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Finding the Fourth Proportional to 205,957.40, 308,936.10 and 161,720.60

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Solution

The fourth proportional to 205,957.40, 308,936.10 and 161,720.60 is: 242,580.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,957.40 : 308,936.10 = 161,720.60 : x
  2. Step 2: Convert to fraction form
    205,957.40/308,936.10 = 161,720.60/x
  3. Step 3: Cross multiply
    205,957.40x = 308,936.10 × 161,720.60
  4. Step 4: Simplify right side
    205,957.40x = 49,961,331,453.66
  5. Step 5: Solve for x
    x = 49,961,331,453.66/205,957.40
  6. Step 6: Final answer
    x = 242,580.90

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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.