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Finding the Fourth Proportional to 206,507.76, 285,067.88 and 139,530.48

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Solution

The fourth proportional to 206,507.76, 285,067.88 and 139,530.48 is: 192,610.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,507.76 : 285,067.88 = 139,530.48 : x
  2. Step 2: Convert to fraction form
    206,507.76/285,067.88 = 139,530.48/x
  3. Step 3: Cross multiply
    206,507.76x = 285,067.88 × 139,530.48
  4. Step 4: Simplify right side
    206,507.76x = 39,775,658,128.98
  5. Step 5: Solve for x
    x = 39,775,658,128.98/206,507.76
  6. Step 6: Final answer
    x = 192,610.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.