Home / 78,375.12-117,570.96-25,784.64

Finding the Fourth Proportional to 78,375.12, 117,570.96 and 25,784.64

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Solution

The fourth proportional to 78,375.12, 117,570.96 and 25,784.64 is: 38,679.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,375.12 : 117,570.96 = 25,784.64 : x
  2. Step 2: Convert to fraction form
    78,375.12/117,570.96 = 25,784.64/x
  3. Step 3: Cross multiply
    78,375.12x = 117,570.96 × 25,784.64
  4. Step 4: Simplify right side
    78,375.12x = 3,031,524,878.05
  5. Step 5: Solve for x
    x = 3,031,524,878.05/78,375.12
  6. Step 6: Final answer
    x = 38,679.68

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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.