Home / 78,736.76-117,973.66-55,321.28

Finding the Fourth Proportional to 78,736.76, 117,973.66 and 55,321.28

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Solution

The fourth proportional to 78,736.76, 117,973.66 and 55,321.28 is: 82,889.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,736.76 : 117,973.66 = 55,321.28 : x
  2. Step 2: Convert to fraction form
    78,736.76/117,973.66 = 55,321.28/x
  3. Step 3: Cross multiply
    78,736.76x = 117,973.66 × 55,321.28
  4. Step 4: Simplify right side
    78,736.76x = 6,526,453,877.48
  5. Step 5: Solve for x
    x = 6,526,453,877.48/78,736.76
  6. Step 6: Final answer
    x = 82,889.54

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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.