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Finding the Fourth Proportional to 205,791.58, 308,476.88 and 139,238.74

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Solution

The fourth proportional to 205,791.58, 308,476.88 and 139,238.74 is: 208,715.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,791.58 : 308,476.88 = 139,238.74 : x
  2. Step 2: Convert to fraction form
    205,791.58/308,476.88 = 139,238.74/x
  3. Step 3: Cross multiply
    205,791.58x = 308,476.88 × 139,238.74
  4. Step 4: Simplify right side
    205,791.58x = 42,951,932,090.33
  5. Step 5: Solve for x
    x = 42,951,932,090.33/205,791.58
  6. Step 6: Final answer
    x = 208,715.69

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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.