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Finding the Fourth Proportional to 120,484.78, 166,269.98 and 66,770.68

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Solution

The fourth proportional to 120,484.78, 166,269.98 and 66,770.68 is: 92,144.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,484.78 : 166,269.98 = 66,770.68 : x
  2. Step 2: Convert to fraction form
    120,484.78/166,269.98 = 66,770.68/x
  3. Step 3: Cross multiply
    120,484.78x = 166,269.98 × 66,770.68
  4. Step 4: Simplify right side
    120,484.78x = 11,101,958,462.98
  5. Step 5: Solve for x
    x = 11,101,958,462.98/120,484.78
  6. Step 6: Final answer
    x = 92,144.08

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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.