Home / 68,515.20-102,728.40-29,061.60

Finding the Fourth Proportional to 68,515.20, 102,728.40 and 29,061.60

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Solution

The fourth proportional to 68,515.20, 102,728.40 and 29,061.60 is: 43,573.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,515.20 : 102,728.40 = 29,061.60 : x
  2. Step 2: Convert to fraction form
    68,515.20/102,728.40 = 29,061.60/x
  3. Step 3: Cross multiply
    68,515.20x = 102,728.40 × 29,061.60
  4. Step 4: Simplify right side
    68,515.20x = 2,985,451,669.44
  5. Step 5: Solve for x
    x = 2,985,451,669.44/68,515.20
  6. Step 6: Final answer
    x = 43,573.57

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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.