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Finding the Fourth Proportional to 120,486.69, 166,269.24 and 66,770.60

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Solution

The fourth proportional to 120,486.69, 166,269.24 and 66,770.60 is: 92,142.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,486.69 : 166,269.24 = 66,770.60 : x
  2. Step 2: Convert to fraction form
    120,486.69/166,269.24 = 66,770.60/x
  3. Step 3: Cross multiply
    120,486.69x = 166,269.24 × 66,770.60
  4. Step 4: Simplify right side
    120,486.69x = 11,101,896,085.00
  5. Step 5: Solve for x
    x = 11,101,896,085.00/120,486.69
  6. Step 6: Final answer
    x = 92,142.10

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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.