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Finding the Fourth Proportional to 120,107.58, 165,745.54 and 66,391.22

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Solution

The fourth proportional to 120,107.58, 165,745.54 and 66,391.22 is: 91,618.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,107.58 : 165,745.54 = 66,391.22 : x
  2. Step 2: Convert to fraction form
    120,107.58/165,745.54 = 66,391.22/x
  3. Step 3: Cross multiply
    120,107.58x = 165,745.54 × 66,391.22
  4. Step 4: Simplify right side
    120,107.58x = 11,004,048,610.16
  5. Step 5: Solve for x
    x = 11,004,048,610.16/120,107.58
  6. Step 6: Final answer
    x = 91,618.27

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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.