Home / 189,455.03-261,431.38-121,351.85

Finding the Fourth Proportional to 189,455.03, 261,431.38 and 121,351.85

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Solution

The fourth proportional to 189,455.03, 261,431.38 and 121,351.85 is: 167,454.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,455.03 : 261,431.38 = 121,351.85 : x
  2. Step 2: Convert to fraction form
    189,455.03/261,431.38 = 121,351.85/x
  3. Step 3: Cross multiply
    189,455.03x = 261,431.38 × 121,351.85
  4. Step 4: Simplify right side
    189,455.03x = 31,725,181,611.05
  5. Step 5: Solve for x
    x = 31,725,181,611.05/189,455.03
  6. Step 6: Final answer
    x = 167,454.94

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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.