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Finding the Fourth Proportional to 68,903.61, 103,174.93 and 45,136.38

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Solution

The fourth proportional to 68,903.61, 103,174.93 and 45,136.38 is: 67,586.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,903.61 : 103,174.93 = 45,136.38 : x
  2. Step 2: Convert to fraction form
    68,903.61/103,174.93 = 45,136.38/x
  3. Step 3: Cross multiply
    68,903.61x = 103,174.93 × 45,136.38
  4. Step 4: Simplify right side
    68,903.61x = 4,656,942,846.95
  5. Step 5: Solve for x
    x = 4,656,942,846.95/68,903.61
  6. Step 6: Final answer
    x = 67,586.34

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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.