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Finding the Fourth Proportional to 120,812.87, 181,219.30 and 45,915.41

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Solution

The fourth proportional to 120,812.87, 181,219.30 and 45,915.41 is: 68,873.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,812.87 : 181,219.30 = 45,915.41 : x
  2. Step 2: Convert to fraction form
    120,812.87/181,219.30 = 45,915.41/x
  3. Step 3: Cross multiply
    120,812.87x = 181,219.30 × 45,915.41
  4. Step 4: Simplify right side
    120,812.87x = 8,320,757,438.53
  5. Step 5: Solve for x
    x = 8,320,757,438.53/120,812.87
  6. Step 6: Final answer
    x = 68,873.11

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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.