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Finding the Fourth Proportional to 81,550.84, 122,275.97 and 28,230.41

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Solution

The fourth proportional to 81,550.84, 122,275.97 and 28,230.41 is: 42,328.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,550.84 : 122,275.97 = 28,230.41 : x
  2. Step 2: Convert to fraction form
    81,550.84/122,275.97 = 28,230.41/x
  3. Step 3: Cross multiply
    81,550.84x = 122,275.97 × 28,230.41
  4. Step 4: Simplify right side
    81,550.84x = 3,451,900,825.00
  5. Step 5: Solve for x
    x = 3,451,900,825.00/81,550.84
  6. Step 6: Final answer
    x = 42,328.21

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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.