Home / 78,116.16-117,179.75-38,662.68

Finding the Fourth Proportional to 78,116.16, 117,179.75 and 38,662.68

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Solution

The fourth proportional to 78,116.16, 117,179.75 and 38,662.68 is: 57,996.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,116.16 : 117,179.75 = 38,662.68 : x
  2. Step 2: Convert to fraction form
    78,116.16/117,179.75 = 38,662.68/x
  3. Step 3: Cross multiply
    78,116.16x = 117,179.75 × 38,662.68
  4. Step 4: Simplify right side
    78,116.16x = 4,530,483,176.73
  5. Step 5: Solve for x
    x = 4,530,483,176.73/78,116.16
  6. Step 6: Final answer
    x = 57,996.75

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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.