Home / 189,917.58-261,962.47-121,826.69

Finding the Fourth Proportional to 189,917.58, 261,962.47 and 121,826.69

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Solution

The fourth proportional to 189,917.58, 261,962.47 and 121,826.69 is: 168,041.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,917.58 : 261,962.47 = 121,826.69 : x
  2. Step 2: Convert to fraction form
    189,917.58/261,962.47 = 121,826.69/x
  3. Step 3: Cross multiply
    189,917.58x = 261,962.47 × 121,826.69
  4. Step 4: Simplify right side
    189,917.58x = 31,914,020,624.32
  5. Step 5: Solve for x
    x = 31,914,020,624.32/189,917.58
  6. Step 6: Final answer
    x = 168,041.42

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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.