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Finding the Fourth Proportional to 161,231.20, 241,610.16 and 81,159.20

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Solution

The fourth proportional to 161,231.20, 241,610.16 and 81,159.20 is: 121,619.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,231.20 : 241,610.16 = 81,159.20 : x
  2. Step 2: Convert to fraction form
    161,231.20/241,610.16 = 81,159.20/x
  3. Step 3: Cross multiply
    161,231.20x = 241,610.16 × 81,159.20
  4. Step 4: Simplify right side
    161,231.20x = 19,608,887,297.47
  5. Step 5: Solve for x
    x = 19,608,887,297.47/161,231.20
  6. Step 6: Final answer
    x = 121,619.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.