Home / 78,321.06-117,481.05-19,157.58

Finding the Fourth Proportional to 78,321.06, 117,481.05 and 19,157.58

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Solution

The fourth proportional to 78,321.06, 117,481.05 and 19,157.58 is: 28,736.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,321.06 : 117,481.05 = 19,157.58 : x
  2. Step 2: Convert to fraction form
    78,321.06/117,481.05 = 19,157.58/x
  3. Step 3: Cross multiply
    78,321.06x = 117,481.05 × 19,157.58
  4. Step 4: Simplify right side
    78,321.06x = 2,250,652,613.86
  5. Step 5: Solve for x
    x = 2,250,652,613.86/78,321.06
  6. Step 6: Final answer
    x = 28,736.24

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1.5x scale

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.