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Finding the Fourth Proportional to 68,807.76, 103,212.60 and 19,559.76

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Solution

The fourth proportional to 68,807.76, 103,212.60 and 19,559.76 is: 29,339.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,807.76 : 103,212.60 = 19,559.76 : x
  2. Step 2: Convert to fraction form
    68,807.76/103,212.60 = 19,559.76/x
  3. Step 3: Cross multiply
    68,807.76x = 103,212.60 × 19,559.76
  4. Step 4: Simplify right side
    68,807.76x = 2,018,813,684.98
  5. Step 5: Solve for x
    x = 2,018,813,684.98/68,807.76
  6. Step 6: Final answer
    x = 29,339.91

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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.