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Finding the Fourth Proportional to 161,307, 222,603.66 and 90,651

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Solution

The fourth proportional to 161,307, 222,603.66 and 90,651 is: 125,098.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,307 : 222,603.66 = 90,651 : x
  2. Step 2: Convert to fraction form
    161,307/222,603.66 = 90,651/x
  3. Step 3: Cross multiply
    161,307x = 222,603.66 × 90,651
  4. Step 4: Simplify right side
    161,307x = 20,179,244,382.66
  5. Step 5: Solve for x
    x = 20,179,244,382.66/161,307
  6. Step 6: Final answer
    x = 125,098.38

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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.