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Finding the Fourth Proportional to 479,076.35, 718,764.38 and 142,118.77

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Solution

The fourth proportional to 479,076.35, 718,764.38 and 142,118.77 is: 213,222.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,076.35 : 718,764.38 = 142,118.77 : x
  2. Step 2: Convert to fraction form
    479,076.35/718,764.38 = 142,118.77/x
  3. Step 3: Cross multiply
    479,076.35x = 718,764.38 × 142,118.77
  4. Step 4: Simplify right side
    479,076.35x = 102,149,909,777.95
  5. Step 5: Solve for x
    x = 102,149,909,777.95/479,076.35
  6. Step 6: Final answer
    x = 213,222.61

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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.