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Finding the Fourth Proportional to 206,528.60, 309,392.10 and 120,932.60

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Solution

The fourth proportional to 206,528.60, 309,392.10 and 120,932.60 is: 181,164.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,528.60 : 309,392.10 = 120,932.60 : x
  2. Step 2: Convert to fraction form
    206,528.60/309,392.10 = 120,932.60/x
  3. Step 3: Cross multiply
    206,528.60x = 309,392.10 × 120,932.60
  4. Step 4: Simplify right side
    206,528.60x = 37,415,591,072.46
  5. Step 5: Solve for x
    x = 37,415,591,072.46/206,528.60
  6. Step 6: Final answer
    x = 181,164.21

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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.