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Finding the Fourth Proportional to 361,011.82, 541,600.78 and 121,157.55

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Solution

The fourth proportional to 361,011.82, 541,600.78 and 121,157.55 is: 181,764.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,011.82 : 541,600.78 = 121,157.55 : x
  2. Step 2: Convert to fraction form
    361,011.82/541,600.78 = 121,157.55/x
  3. Step 3: Cross multiply
    361,011.82x = 541,600.78 × 121,157.55
  4. Step 4: Simplify right side
    361,011.82x = 65,619,023,582.89
  5. Step 5: Solve for x
    x = 65,619,023,582.89/361,011.82
  6. Step 6: Final answer
    x = 181,764.20

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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.