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Finding the Fourth Proportional to 68,531.72, 102,775.70 and 21,773.66

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Solution

The fourth proportional to 68,531.72, 102,775.70 and 21,773.66 is: 32,653.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,531.72 : 102,775.70 = 21,773.66 : x
  2. Step 2: Convert to fraction form
    68,531.72/102,775.70 = 21,773.66/x
  3. Step 3: Cross multiply
    68,531.72x = 102,775.70 × 21,773.66
  4. Step 4: Simplify right side
    68,531.72x = 2,237,802,688.62
  5. Step 5: Solve for x
    x = 2,237,802,688.62/68,531.72
  6. Step 6: Final answer
    x = 32,653.53

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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.