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Finding the Fourth Proportional to 117,216.72, 161,755.71 and 68,817.84

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Solution

The fourth proportional to 117,216.72, 161,755.71 and 68,817.84 is: 94,966.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,216.72 : 161,755.71 = 68,817.84 : x
  2. Step 2: Convert to fraction form
    117,216.72/161,755.71 = 68,817.84/x
  3. Step 3: Cross multiply
    117,216.72x = 161,755.71 × 68,817.84
  4. Step 4: Simplify right side
    117,216.72x = 11,131,678,569.87
  5. Step 5: Solve for x
    x = 11,131,678,569.87/117,216.72
  6. Step 6: Final answer
    x = 94,966.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.