Home / 120,930.72-180,481.56-117,781.44

Finding the Fourth Proportional to 120,930.72, 180,481.56 and 117,781.44

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Solution

The fourth proportional to 120,930.72, 180,481.56 and 117,781.44 is: 175,781.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,930.72 : 180,481.56 = 117,781.44 : x
  2. Step 2: Convert to fraction form
    120,930.72/180,481.56 = 117,781.44/x
  3. Step 3: Cross multiply
    120,930.72x = 180,481.56 × 117,781.44
  4. Step 4: Simplify right side
    120,930.72x = 21,257,378,030.25
  5. Step 5: Solve for x
    x = 21,257,378,030.25/120,930.72
  6. Step 6: Final answer
    x = 175,781.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.