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Finding the Fourth Proportional to 68,903.95, 103,175.49 and 45,136.75

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Solution

The fourth proportional to 68,903.95, 103,175.49 and 45,136.75 is: 67,586.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,903.95 : 103,175.49 = 45,136.75 : x
  2. Step 2: Convert to fraction form
    68,903.95/103,175.49 = 45,136.75/x
  3. Step 3: Cross multiply
    68,903.95x = 103,175.49 × 45,136.75
  4. Step 4: Simplify right side
    68,903.95x = 4,657,006,298.26
  5. Step 5: Solve for x
    x = 4,657,006,298.26/68,903.95
  6. Step 6: Final answer
    x = 67,586.93

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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.