Home / 107,422.20-161,186.76-81,287.28

Finding the Fourth Proportional to 107,422.20, 161,186.76 and 81,287.28

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Solution

The fourth proportional to 107,422.20, 161,186.76 and 81,287.28 is: 121,971.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,422.20 : 161,186.76 = 81,287.28 : x
  2. Step 2: Convert to fraction form
    107,422.20/161,186.76 = 81,287.28/x
  3. Step 3: Cross multiply
    107,422.20x = 161,186.76 × 81,287.28
  4. Step 4: Simplify right side
    107,422.20x = 13,102,433,292.41
  5. Step 5: Solve for x
    x = 13,102,433,292.41/107,422.20
  6. Step 6: Final answer
    x = 121,971.37

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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.