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Finding the Fourth Proportional to 68,427.50, 103,188.44 and 67,491.86

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Solution

The fourth proportional to 68,427.50, 103,188.44 and 67,491.86 is: 101,777.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,427.50 : 103,188.44 = 67,491.86 : x
  2. Step 2: Convert to fraction form
    68,427.50/103,188.44 = 67,491.86/x
  3. Step 3: Cross multiply
    68,427.50x = 103,188.44 × 67,491.86
  4. Step 4: Simplify right side
    68,427.50x = 6,964,379,746.10
  5. Step 5: Solve for x
    x = 6,964,379,746.10/68,427.50
  6. Step 6: Final answer
    x = 101,777.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.