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Finding the Fourth Proportional to 218,783.97, 328,231.31 and 61,012.44

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Solution

The fourth proportional to 218,783.97, 328,231.31 and 61,012.44 is: 91,534.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,783.97 : 328,231.31 = 61,012.44 : x
  2. Step 2: Convert to fraction form
    218,783.97/328,231.31 = 61,012.44/x
  3. Step 3: Cross multiply
    218,783.97x = 328,231.31 × 61,012.44
  4. Step 4: Simplify right side
    218,783.97x = 20,026,193,107.50
  5. Step 5: Solve for x
    x = 20,026,193,107.50/218,783.97
  6. Step 6: Final answer
    x = 91,534.10

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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.