Home / 189,739.88-261,877.59-121,842.65

Finding the Fourth Proportional to 189,739.88, 261,877.59 and 121,842.65

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Solution

The fourth proportional to 189,739.88, 261,877.59 and 121,842.65 is: 168,166.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,739.88 : 261,877.59 = 121,842.65 : x
  2. Step 2: Convert to fraction form
    189,739.88/261,877.59 = 121,842.65/x
  3. Step 3: Cross multiply
    189,739.88x = 261,877.59 × 121,842.65
  4. Step 4: Simplify right side
    189,739.88x = 31,907,858,722.85
  5. Step 5: Solve for x
    x = 31,907,858,722.85/189,739.88
  6. Step 6: Final answer
    x = 168,166.32

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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.