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Finding the Fourth Proportional to 68,983.75, 103,548.01 and 61,136.47

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Solution

The fourth proportional to 68,983.75, 103,548.01 and 61,136.47 is: 91,768.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,983.75 : 103,548.01 = 61,136.47 : x
  2. Step 2: Convert to fraction form
    68,983.75/103,548.01 = 61,136.47/x
  3. Step 3: Cross multiply
    68,983.75x = 103,548.01 × 61,136.47
  4. Step 4: Simplify right side
    68,983.75x = 6,330,559,289.18
  5. Step 5: Solve for x
    x = 6,330,559,289.18/68,983.75
  6. Step 6: Final answer
    x = 91,768.85

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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.