Home / 121,078.13-167,089.34-66,636.56

Finding the Fourth Proportional to 121,078.13, 167,089.34 and 66,636.56

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Solution

The fourth proportional to 121,078.13, 167,089.34 and 66,636.56 is: 91,959.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,078.13 : 167,089.34 = 66,636.56 : x
  2. Step 2: Convert to fraction form
    121,078.13/167,089.34 = 66,636.56/x
  3. Step 3: Cross multiply
    121,078.13x = 167,089.34 × 66,636.56
  4. Step 4: Simplify right side
    121,078.13x = 11,134,259,414.59
  5. Step 5: Solve for x
    x = 11,134,259,414.59/121,078.13
  6. Step 6: Final answer
    x = 91,959.30

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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.