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Finding the Fourth Proportional to 61,059.68, 91,599.90 and 21,067.82

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Solution

The fourth proportional to 61,059.68, 91,599.90 and 21,067.82 is: 31,605.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,059.68 : 91,599.90 = 21,067.82 : x
  2. Step 2: Convert to fraction form
    61,059.68/91,599.90 = 21,067.82/x
  3. Step 3: Cross multiply
    61,059.68x = 91,599.90 × 21,067.82
  4. Step 4: Simplify right side
    61,059.68x = 1,929,810,205.22
  5. Step 5: Solve for x
    x = 1,929,810,205.22/61,059.68
  6. Step 6: Final answer
    x = 31,605.31

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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.