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Finding the Fourth Proportional to 205,348.80, 307,950.30 and 142,168.80

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Solution

The fourth proportional to 205,348.80, 307,950.30 and 142,168.80 is: 213,202.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,348.80 : 307,950.30 = 142,168.80 : x
  2. Step 2: Convert to fraction form
    205,348.80/307,950.30 = 142,168.80/x
  3. Step 3: Cross multiply
    205,348.80x = 307,950.30 × 142,168.80
  4. Step 4: Simplify right side
    205,348.80x = 43,780,924,610.64
  5. Step 5: Solve for x
    x = 43,780,924,610.64/205,348.80
  6. Step 6: Final answer
    x = 213,202.73

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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.