Home / 78,103.60-117,170.70-25,498.96

Finding the Fourth Proportional to 78,103.60, 117,170.70 and 25,498.96

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Solution

The fourth proportional to 78,103.60, 117,170.70 and 25,498.96 is: 38,253.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,103.60 : 117,170.70 = 25,498.96 : x
  2. Step 2: Convert to fraction form
    78,103.60/117,170.70 = 25,498.96/x
  3. Step 3: Cross multiply
    78,103.60x = 117,170.70 × 25,498.96
  4. Step 4: Simplify right side
    78,103.60x = 2,987,730,992.47
  5. Step 5: Solve for x
    x = 2,987,730,992.47/78,103.60
  6. Step 6: Final answer
    x = 38,253.44

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1.5x scale

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.