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Finding the Fourth Proportional to 120,322.92, 166,043.64 and 66,606.80

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Solution

The fourth proportional to 120,322.92, 166,043.64 and 66,606.80 is: 91,916.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,322.92 : 166,043.64 = 66,606.80 : x
  2. Step 2: Convert to fraction form
    120,322.92/166,043.64 = 66,606.80/x
  3. Step 3: Cross multiply
    120,322.92x = 166,043.64 × 66,606.80
  4. Step 4: Simplify right side
    120,322.92x = 11,059,635,520.75
  5. Step 5: Solve for x
    x = 11,059,635,520.75/120,322.92
  6. Step 6: Final answer
    x = 91,916.28

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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.