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Finding the Fourth Proportional to 120,636.94, 166,498.93 and 66,939.25

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Solution

The fourth proportional to 120,636.94, 166,498.93 and 66,939.25 is: 92,387.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,636.94 : 166,498.93 = 66,939.25 : x
  2. Step 2: Convert to fraction form
    120,636.94/166,498.93 = 66,939.25/x
  3. Step 3: Cross multiply
    120,636.94x = 166,498.93 × 66,939.25
  4. Step 4: Simplify right side
    120,636.94x = 11,145,313,500.00
  5. Step 5: Solve for x
    x = 11,145,313,500.00/120,636.94
  6. Step 6: Final answer
    x = 92,387.24

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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.