Home / 117,171.31-161,712.50-71,841.28

Finding the Fourth Proportional to 117,171.31, 161,712.50 and 71,841.28

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Solution

The fourth proportional to 117,171.31, 161,712.50 and 71,841.28 is: 99,150.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,171.31 : 161,712.50 = 71,841.28 : x
  2. Step 2: Convert to fraction form
    117,171.31/161,712.50 = 71,841.28/x
  3. Step 3: Cross multiply
    117,171.31x = 161,712.50 × 71,841.28
  4. Step 4: Simplify right side
    117,171.31x = 11,617,632,992
  5. Step 5: Solve for x
    x = 11,617,632,992/117,171.31
  6. Step 6: Final answer
    x = 99,150.83

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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.