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Finding the Fourth Proportional to 161,305, 222,600.90 and 90,649

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Solution

The fourth proportional to 161,305, 222,600.90 and 90,649 is: 125,095.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,305 : 222,600.90 = 90,649 : x
  2. Step 2: Convert to fraction form
    161,305/222,600.90 = 90,649/x
  3. Step 3: Cross multiply
    161,305x = 222,600.90 × 90,649
  4. Step 4: Simplify right side
    161,305x = 20,178,548,984.10
  5. Step 5: Solve for x
    x = 20,178,548,984.10/161,305
  6. Step 6: Final answer
    x = 125,095.62

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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.