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Finding the Fourth Proportional to 68,878.50, 103,335.09 and 19,630.50

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Solution

The fourth proportional to 68,878.50, 103,335.09 and 19,630.50 is: 29,450.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,878.50 : 103,335.09 = 19,630.50 : x
  2. Step 2: Convert to fraction form
    68,878.50/103,335.09 = 19,630.50/x
  3. Step 3: Cross multiply
    68,878.50x = 103,335.09 × 19,630.50
  4. Step 4: Simplify right side
    68,878.50x = 2,028,519,484.25
  5. Step 5: Solve for x
    x = 2,028,519,484.25/68,878.50
  6. Step 6: Final answer
    x = 29,450.69

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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.