Home / 78,578.15-117,878.09-25,271.64

Finding the Fourth Proportional to 78,578.15, 117,878.09 and 25,271.64

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Solution

The fourth proportional to 78,578.15, 117,878.09 and 25,271.64 is: 37,910.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,578.15 : 117,878.09 = 25,271.64 : x
  2. Step 2: Convert to fraction form
    78,578.15/117,878.09 = 25,271.64/x
  3. Step 3: Cross multiply
    78,578.15x = 117,878.09 × 25,271.64
  4. Step 4: Simplify right side
    78,578.15x = 2,978,972,528.01
  5. Step 5: Solve for x
    x = 2,978,972,528.01/78,578.15
  6. Step 6: Final answer
    x = 37,910.96

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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.