Home / 120,135.28-165,790.56-66,422.08

Finding the Fourth Proportional to 120,135.28, 165,790.56 and 66,422.08

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Solution

The fourth proportional to 120,135.28, 165,790.56 and 66,422.08 is: 91,664.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,135.28 : 165,790.56 = 66,422.08 : x
  2. Step 2: Convert to fraction form
    120,135.28/165,790.56 = 66,422.08/x
  3. Step 3: Cross multiply
    120,135.28x = 165,790.56 × 66,422.08
  4. Step 4: Simplify right side
    120,135.28x = 11,012,153,839.56
  5. Step 5: Solve for x
    x = 11,012,153,839.56/120,135.28
  6. Step 6: Final answer
    x = 91,664.61

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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.