Home / 189,800.42-261,820.96-121,741.68

Finding the Fourth Proportional to 189,800.42, 261,820.96 and 121,741.68

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Solution

The fourth proportional to 189,800.42, 261,820.96 and 121,741.68 is: 167,937.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,800.42 : 261,820.96 = 121,741.68 : x
  2. Step 2: Convert to fraction form
    189,800.42/261,820.96 = 121,741.68/x
  3. Step 3: Cross multiply
    189,800.42x = 261,820.96 × 121,741.68
  4. Step 4: Simplify right side
    189,800.42x = 31,874,524,207.09
  5. Step 5: Solve for x
    x = 31,874,524,207.09/189,800.42
  6. Step 6: Final answer
    x = 167,937.06

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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.