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Finding the Fourth Proportional to 221,941.68, 306,300.60 and 121,354.80

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Solution

The fourth proportional to 221,941.68, 306,300.60 and 121,354.80 is: 167,481.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,941.68 : 306,300.60 = 121,354.80 : x
  2. Step 2: Convert to fraction form
    221,941.68/306,300.60 = 121,354.80/x
  3. Step 3: Cross multiply
    221,941.68x = 306,300.60 × 121,354.80
  4. Step 4: Simplify right side
    221,941.68x = 37,171,048,052.88
  5. Step 5: Solve for x
    x = 37,171,048,052.88/221,941.68
  6. Step 6: Final answer
    x = 167,481.15

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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.