Home / 87,400.25-121,069.14-85,628.78

Finding the Fourth Proportional to 87,400.25, 121,069.14 and 85,628.78

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Solution

The fourth proportional to 87,400.25, 121,069.14 and 85,628.78 is: 118,615.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,400.25 : 121,069.14 = 85,628.78 : x
  2. Step 2: Convert to fraction form
    87,400.25/121,069.14 = 85,628.78/x
  3. Step 3: Cross multiply
    87,400.25x = 121,069.14 × 85,628.78
  4. Step 4: Simplify right side
    87,400.25x = 10,367,002,522.24
  5. Step 5: Solve for x
    x = 10,367,002,522.24/87,400.25
  6. Step 6: Final answer
    x = 118,615.25

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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.