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Finding the Fourth Proportional to 120,484.74, 166,269.36 and 66,770.66

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Solution

The fourth proportional to 120,484.74, 166,269.36 and 66,770.66 is: 92,143.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,484.74 : 166,269.36 = 66,770.66 : x
  2. Step 2: Convert to fraction form
    120,484.74/166,269.36 = 66,770.66/x
  3. Step 3: Cross multiply
    120,484.74x = 166,269.36 × 66,770.66
  4. Step 4: Simplify right side
    120,484.74x = 11,101,914,904.98
  5. Step 5: Solve for x
    x = 11,101,914,904.98/120,484.74
  6. Step 6: Final answer
    x = 92,143.74

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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.