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Finding the Fourth Proportional to 168,221.34, 251,970.21 and 79,341.66

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Solution

The fourth proportional to 168,221.34, 251,970.21 and 79,341.66 is: 118,841.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,221.34 : 251,970.21 = 79,341.66 : x
  2. Step 2: Convert to fraction form
    168,221.34/251,970.21 = 79,341.66/x
  3. Step 3: Cross multiply
    168,221.34x = 251,970.21 × 79,341.66
  4. Step 4: Simplify right side
    168,221.34x = 19,991,734,731.95
  5. Step 5: Solve for x
    x = 19,991,734,731.95/168,221.34
  6. Step 6: Final answer
    x = 118,841.85

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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.