Home / 149,111.28-205,775.60-81,129.06

Finding the Fourth Proportional to 149,111.28, 205,775.60 and 81,129.06

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Solution

The fourth proportional to 149,111.28, 205,775.60 and 81,129.06 is: 111,959.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,111.28 : 205,775.60 = 81,129.06 : x
  2. Step 2: Convert to fraction form
    149,111.28/205,775.60 = 81,129.06/x
  3. Step 3: Cross multiply
    149,111.28x = 205,775.60 × 81,129.06
  4. Step 4: Simplify right side
    149,111.28x = 16,694,380,593.29
  5. Step 5: Solve for x
    x = 16,694,380,593.29/149,111.28
  6. Step 6: Final answer
    x = 111,959.21

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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.