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Finding the Fourth Proportional to 68,984.25, 103,548.76 and 61,136.97

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Solution

The fourth proportional to 68,984.25, 103,548.76 and 61,136.97 is: 91,769.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,984.25 : 103,548.76 = 61,136.97 : x
  2. Step 2: Convert to fraction form
    68,984.25/103,548.76 = 61,136.97/x
  3. Step 3: Cross multiply
    68,984.25x = 103,548.76 × 61,136.97
  4. Step 4: Simplify right side
    68,984.25x = 6,330,657,433.66
  5. Step 5: Solve for x
    x = 6,330,657,433.66/68,984.25
  6. Step 6: Final answer
    x = 91,769.61

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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.