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Finding the Fourth Proportional to 120,597.72, 166,434.84 and 66,900

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Solution

The fourth proportional to 120,597.72, 166,434.84 and 66,900 is: 92,327.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,597.72 : 166,434.84 = 66,900 : x
  2. Step 2: Convert to fraction form
    120,597.72/166,434.84 = 66,900/x
  3. Step 3: Cross multiply
    120,597.72x = 166,434.84 × 66,900
  4. Step 4: Simplify right side
    120,597.72x = 11,134,490,796
  5. Step 5: Solve for x
    x = 11,134,490,796/120,597.72
  6. Step 6: Final answer
    x = 92,327.54

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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.