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Finding the Fourth Proportional to 117,379.62, 161,983.88 and 66,391.25

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Solution

The fourth proportional to 117,379.62, 161,983.88 and 66,391.25 is: 91,619.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,379.62 : 161,983.88 = 66,391.25 : x
  2. Step 2: Convert to fraction form
    117,379.62/161,983.88 = 66,391.25/x
  3. Step 3: Cross multiply
    117,379.62x = 161,983.88 × 66,391.25
  4. Step 4: Simplify right side
    117,379.62x = 10,754,311,702.11
  5. Step 5: Solve for x
    x = 10,754,311,702.11/117,379.62
  6. Step 6: Final answer
    x = 91,619.93

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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.