Home / 81,918.11-122,893.56-25,772.34

Finding the Fourth Proportional to 81,918.11, 122,893.56 and 25,772.34

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Solution

The fourth proportional to 81,918.11, 122,893.56 and 25,772.34 is: 38,663.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,918.11 : 122,893.56 = 25,772.34 : x
  2. Step 2: Convert to fraction form
    81,918.11/122,893.56 = 25,772.34/x
  3. Step 3: Cross multiply
    81,918.11x = 122,893.56 × 25,772.34
  4. Step 4: Simplify right side
    81,918.11x = 3,167,254,612.13
  5. Step 5: Solve for x
    x = 3,167,254,612.13/81,918.11
  6. Step 6: Final answer
    x = 38,663.67

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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.