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Finding the Fourth Proportional to 117,203.67, 161,731.45 and 66,220.82

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Solution

The fourth proportional to 117,203.67, 161,731.45 and 66,220.82 is: 91,379.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,203.67 : 161,731.45 = 66,220.82 : x
  2. Step 2: Convert to fraction form
    117,203.67/161,731.45 = 66,220.82/x
  3. Step 3: Cross multiply
    117,203.67x = 161,731.45 × 66,220.82
  4. Step 4: Simplify right side
    117,203.67x = 10,709,988,099.03
  5. Step 5: Solve for x
    x = 10,709,988,099.03/117,203.67
  6. Step 6: Final answer
    x = 91,379.29

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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.