Home / 189,891.03-261,811.35-121,787.85

Finding the Fourth Proportional to 189,891.03, 261,811.35 and 121,787.85

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Solution

The fourth proportional to 189,891.03, 261,811.35 and 121,787.85 is: 167,914.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,891.03 : 261,811.35 = 121,787.85 : x
  2. Step 2: Convert to fraction form
    189,891.03/261,811.35 = 121,787.85/x
  3. Step 3: Cross multiply
    189,891.03x = 261,811.35 × 121,787.85
  4. Step 4: Simplify right side
    189,891.03x = 31,885,441,422.10
  5. Step 5: Solve for x
    x = 31,885,441,422.10/189,891.03
  6. Step 6: Final answer
    x = 167,914.42

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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.