Home / 189,929.28-261,845.92-121,828.03

Finding the Fourth Proportional to 189,929.28, 261,845.92 and 121,828.03

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Solution

The fourth proportional to 189,929.28, 261,845.92 and 121,828.03 is: 167,958.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,929.28 : 261,845.92 = 121,828.03 : x
  2. Step 2: Convert to fraction form
    189,929.28/261,845.92 = 121,828.03/x
  3. Step 3: Cross multiply
    189,929.28x = 261,845.92 × 121,828.03
  4. Step 4: Simplify right side
    189,929.28x = 31,900,172,597.14
  5. Step 5: Solve for x
    x = 31,900,172,597.14/189,929.28
  6. Step 6: Final answer
    x = 167,958.16

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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.