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Finding the Fourth Proportional to 68,343.70, 102,515.55 and 65,719.30

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Solution

The fourth proportional to 68,343.70, 102,515.55 and 65,719.30 is: 98,578.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,343.70 : 102,515.55 = 65,719.30 : x
  2. Step 2: Convert to fraction form
    68,343.70/102,515.55 = 65,719.30/x
  3. Step 3: Cross multiply
    68,343.70x = 102,515.55 × 65,719.30
  4. Step 4: Simplify right side
    68,343.70x = 6,737,250,185.12
  5. Step 5: Solve for x
    x = 6,737,250,185.12/68,343.70
  6. Step 6: Final answer
    x = 98,578.95

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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.