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Finding the Fourth Proportional to 205,958.90, 308,938.35 and 161,722.10

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Solution

The fourth proportional to 205,958.90, 308,938.35 and 161,722.10 is: 242,583.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,958.90 : 308,938.35 = 161,722.10 : x
  2. Step 2: Convert to fraction form
    205,958.90/308,938.35 = 161,722.10/x
  3. Step 3: Cross multiply
    205,958.90x = 308,938.35 × 161,722.10
  4. Step 4: Simplify right side
    205,958.90x = 49,962,158,732.54
  5. Step 5: Solve for x
    x = 49,962,158,732.54/205,958.90
  6. Step 6: Final answer
    x = 242,583.15

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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.