Home / 81,636.22-122,481.60-31,717.90

Finding the Fourth Proportional to 81,636.22, 122,481.60 and 31,717.90

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Solution

The fourth proportional to 81,636.22, 122,481.60 and 31,717.90 is: 47,587.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,636.22 : 122,481.60 = 31,717.90 : x
  2. Step 2: Convert to fraction form
    81,636.22/122,481.60 = 31,717.90/x
  3. Step 3: Cross multiply
    81,636.22x = 122,481.60 × 31,717.90
  4. Step 4: Simplify right side
    81,636.22x = 3,884,859,140.64
  5. Step 5: Solve for x
    x = 3,884,859,140.64/81,636.22
  6. Step 6: Final answer
    x = 47,587.45

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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.