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Finding the Fourth Proportional to 206,066.80, 308,581.80 and 135,564.40

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Solution

The fourth proportional to 206,066.80, 308,581.80 and 135,564.40 is: 203,005.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,066.80 : 308,581.80 = 135,564.40 : x
  2. Step 2: Convert to fraction form
    206,066.80/308,581.80 = 135,564.40/x
  3. Step 3: Cross multiply
    206,066.80x = 308,581.80 × 135,564.40
  4. Step 4: Simplify right side
    206,066.80x = 41,832,706,567.92
  5. Step 5: Solve for x
    x = 41,832,706,567.92/206,066.80
  6. Step 6: Final answer
    x = 203,005.56

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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.