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Finding the Fourth Proportional to 68,211.46, 102,331.06 and 28,768.71

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Solution

The fourth proportional to 68,211.46, 102,331.06 and 28,768.71 is: 43,158.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,211.46 : 102,331.06 = 28,768.71 : x
  2. Step 2: Convert to fraction form
    68,211.46/102,331.06 = 28,768.71/x
  3. Step 3: Cross multiply
    68,211.46x = 102,331.06 × 28,768.71
  4. Step 4: Simplify right side
    68,211.46x = 2,943,932,517.21
  5. Step 5: Solve for x
    x = 2,943,932,517.21/68,211.46
  6. Step 6: Final answer
    x = 43,158.92

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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.