Home / 81,400.20-122,100.30-28,802.85

Finding the Fourth Proportional to 81,400.20, 122,100.30 and 28,802.85

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Solution

The fourth proportional to 81,400.20, 122,100.30 and 28,802.85 is: 43,204.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,400.20 : 122,100.30 = 28,802.85 : x
  2. Step 2: Convert to fraction form
    81,400.20/122,100.30 = 28,802.85/x
  3. Step 3: Cross multiply
    81,400.20x = 122,100.30 × 28,802.85
  4. Step 4: Simplify right side
    81,400.20x = 3,516,836,625.86
  5. Step 5: Solve for x
    x = 3,516,836,625.86/81,400.20
  6. Step 6: Final answer
    x = 43,204.28

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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.