Home / 78,579.15-117,879.59-25,272.64

Finding the Fourth Proportional to 78,579.15, 117,879.59 and 25,272.64

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Solution

The fourth proportional to 78,579.15, 117,879.59 and 25,272.64 is: 37,912.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,579.15 : 117,879.59 = 25,272.64 : x
  2. Step 2: Convert to fraction form
    78,579.15/117,879.59 = 25,272.64/x
  3. Step 3: Cross multiply
    78,579.15x = 117,879.59 × 25,272.64
  4. Step 4: Simplify right side
    78,579.15x = 2,979,128,441.42
  5. Step 5: Solve for x
    x = 2,979,128,441.42/78,579.15
  6. Step 6: Final answer
    x = 37,912.45

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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.