Home / 78,150.78-117,231.44-38,697.30

Finding the Fourth Proportional to 78,150.78, 117,231.44 and 38,697.30

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Solution

The fourth proportional to 78,150.78, 117,231.44 and 38,697.30 is: 58,048.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,150.78 : 117,231.44 = 38,697.30 : x
  2. Step 2: Convert to fraction form
    78,150.78/117,231.44 = 38,697.30/x
  3. Step 3: Cross multiply
    78,150.78x = 117,231.44 × 38,697.30
  4. Step 4: Simplify right side
    78,150.78x = 4,536,540,203.11
  5. Step 5: Solve for x
    x = 4,536,540,203.11/78,150.78
  6. Step 6: Final answer
    x = 58,048.56

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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.