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Finding the Fourth Proportional to 206,119.89, 308,777.18 and 142,066.65

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Solution

The fourth proportional to 206,119.89, 308,777.18 and 142,066.65 is: 212,822.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,119.89 : 308,777.18 = 142,066.65 : x
  2. Step 2: Convert to fraction form
    206,119.89/308,777.18 = 142,066.65/x
  3. Step 3: Cross multiply
    206,119.89x = 308,777.18 × 142,066.65
  4. Step 4: Simplify right side
    206,119.89x = 43,866,938,848.71
  5. Step 5: Solve for x
    x = 43,866,938,848.71/206,119.89
  6. Step 6: Final answer
    x = 212,822.44

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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.