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Finding the Fourth Proportional to 120,503.66, 166,300.65 and 66,789.86

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Solution

The fourth proportional to 120,503.66, 166,300.65 and 66,789.86 is: 92,173.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,503.66 : 166,300.65 = 66,789.86 : x
  2. Step 2: Convert to fraction form
    120,503.66/166,300.65 = 66,789.86/x
  3. Step 3: Cross multiply
    120,503.66x = 166,300.65 × 66,789.86
  4. Step 4: Simplify right side
    120,503.66x = 11,107,196,299.91
  5. Step 5: Solve for x
    x = 11,107,196,299.91/120,503.66
  6. Step 6: Final answer
    x = 92,173.11

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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.