Home / 120,131.07-165,784.34-66,419.56

Finding the Fourth Proportional to 120,131.07, 165,784.34 and 66,419.56

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Solution

The fourth proportional to 120,131.07, 165,784.34 and 66,419.56 is: 91,660.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,131.07 : 165,784.34 = 66,419.56 : x
  2. Step 2: Convert to fraction form
    120,131.07/165,784.34 = 66,419.56/x
  3. Step 3: Cross multiply
    120,131.07x = 165,784.34 × 66,419.56
  4. Step 4: Simplify right side
    120,131.07x = 11,011,322,669.28
  5. Step 5: Solve for x
    x = 11,011,322,669.28/120,131.07
  6. Step 6: Final answer
    x = 91,660.90

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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.