Home / 78,039.60-117,078.04-25,449.14

Finding the Fourth Proportional to 78,039.60, 117,078.04 and 25,449.14

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Solution

The fourth proportional to 78,039.60, 117,078.04 and 25,449.14 is: 38,179.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,039.60 : 117,078.04 = 25,449.14 : x
  2. Step 2: Convert to fraction form
    78,039.60/117,078.04 = 25,449.14/x
  3. Step 3: Cross multiply
    78,039.60x = 117,078.04 × 25,449.14
  4. Step 4: Simplify right side
    78,039.60x = 2,979,535,430.89
  5. Step 5: Solve for x
    x = 2,979,535,430.89/78,039.60
  6. Step 6: Final answer
    x = 38,179.79

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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.