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Finding the Fourth Proportional to 120,268.80, 165,969.60 and 66,555.52

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Solution

The fourth proportional to 120,268.80, 165,969.60 and 66,555.52 is: 91,845.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,268.80 : 165,969.60 = 66,555.52 : x
  2. Step 2: Convert to fraction form
    120,268.80/165,969.60 = 66,555.52/x
  3. Step 3: Cross multiply
    120,268.80x = 165,969.60 × 66,555.52
  4. Step 4: Simplify right side
    120,268.80x = 11,046,193,032.19
  5. Step 5: Solve for x
    x = 11,046,193,032.19/120,268.80
  6. Step 6: Final answer
    x = 91,845.87

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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.