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Finding the Fourth Proportional to 221,782.20, 306,059.41 and 121,180.20

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Solution

The fourth proportional to 221,782.20, 306,059.41 and 121,180.20 is: 167,228.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,782.20 : 306,059.41 = 121,180.20 : x
  2. Step 2: Convert to fraction form
    221,782.20/306,059.41 = 121,180.20/x
  3. Step 3: Cross multiply
    221,782.20x = 306,059.41 × 121,180.20
  4. Step 4: Simplify right side
    221,782.20x = 37,088,340,515.68
  5. Step 5: Solve for x
    x = 37,088,340,515.68/221,782.20
  6. Step 6: Final answer
    x = 167,228.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.