Home / 87,401.75-121,071.21-85,630.28

Finding the Fourth Proportional to 87,401.75, 121,071.21 and 85,630.28

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Solution

The fourth proportional to 87,401.75, 121,071.21 and 85,630.28 is: 118,617.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,401.75 : 121,071.21 = 85,630.28 : x
  2. Step 2: Convert to fraction form
    87,401.75/121,071.21 = 85,630.28/x
  3. Step 3: Cross multiply
    87,401.75x = 121,071.21 × 85,630.28
  4. Step 4: Simplify right side
    87,401.75x = 10,367,361,006.88
  5. Step 5: Solve for x
    x = 10,367,361,006.88/87,401.75
  6. Step 6: Final answer
    x = 118,617.32

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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.