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Finding the Fourth Proportional to 201,930.61, 278,677.39 and 115,917.43

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Solution

The fourth proportional to 201,930.61, 278,677.39 and 115,917.43 is: 159,973.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,930.61 : 278,677.39 = 115,917.43 : x
  2. Step 2: Convert to fraction form
    201,930.61/278,677.39 = 115,917.43/x
  3. Step 3: Cross multiply
    201,930.61x = 278,677.39 × 115,917.43
  4. Step 4: Simplify right side
    201,930.61x = 32,303,567,450.94
  5. Step 5: Solve for x
    x = 32,303,567,450.94/201,930.61
  6. Step 6: Final answer
    x = 159,973.60

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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.