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Finding the Fourth Proportional to 120,573.78, 166,391.13 and 66,866.73

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Solution

The fourth proportional to 120,573.78, 166,391.13 and 66,866.73 is: 92,275.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,573.78 : 166,391.13 = 66,866.73 : x
  2. Step 2: Convert to fraction form
    120,573.78/166,391.13 = 66,866.73/x
  3. Step 3: Cross multiply
    120,573.78x = 166,391.13 × 66,866.73
  4. Step 4: Simplify right side
    120,573.78x = 11,126,030,764.10
  5. Step 5: Solve for x
    x = 11,126,030,764.10/120,573.78
  6. Step 6: Final answer
    x = 92,275.71

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1.5x scale

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.