Home / 87,401.25-121,070.52-85,629.78

Finding the Fourth Proportional to 87,401.25, 121,070.52 and 85,629.78

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Solution

The fourth proportional to 87,401.25, 121,070.52 and 85,629.78 is: 118,616.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,401.25 : 121,070.52 = 85,629.78 : x
  2. Step 2: Convert to fraction form
    87,401.25/121,070.52 = 85,629.78/x
  3. Step 3: Cross multiply
    87,401.25x = 121,070.52 × 85,629.78
  4. Step 4: Simplify right side
    87,401.25x = 10,367,241,992.09
  5. Step 5: Solve for x
    x = 10,367,241,992.09/87,401.25
  6. Step 6: Final answer
    x = 118,616.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.