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Finding the Fourth Proportional to 68,625.96, 102,955.59 and 21,878.79

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Solution

The fourth proportional to 68,625.96, 102,955.59 and 21,878.79 is: 32,823.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,625.96 : 102,955.59 = 21,878.79 : x
  2. Step 2: Convert to fraction form
    68,625.96/102,955.59 = 21,878.79/x
  3. Step 3: Cross multiply
    68,625.96x = 102,955.59 × 21,878.79
  4. Step 4: Simplify right side
    68,625.96x = 2,252,543,732.94
  5. Step 5: Solve for x
    x = 2,252,543,732.94/68,625.96
  6. Step 6: Final answer
    x = 32,823.49

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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.