Home / 120,134.08-165,788.49-66,422.56

Finding the Fourth Proportional to 120,134.08, 165,788.49 and 66,422.56

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Solution

The fourth proportional to 120,134.08, 165,788.49 and 66,422.56 is: 91,665.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,134.08 : 165,788.49 = 66,422.56 : x
  2. Step 2: Convert to fraction form
    120,134.08/165,788.49 = 66,422.56/x
  3. Step 3: Cross multiply
    120,134.08x = 165,788.49 × 66,422.56
  4. Step 4: Simplify right side
    120,134.08x = 11,012,095,924.33
  5. Step 5: Solve for x
    x = 11,012,095,924.33/120,134.08
  6. Step 6: Final answer
    x = 91,665.05

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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.