Home / 189,489.20-261,499.85-107,812.96

Finding the Fourth Proportional to 189,489.20, 261,499.85 and 107,812.96

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Solution

The fourth proportional to 189,489.20, 261,499.85 and 107,812.96 is: 148,784.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,489.20 : 261,499.85 = 107,812.96 : x
  2. Step 2: Convert to fraction form
    189,489.20/261,499.85 = 107,812.96/x
  3. Step 3: Cross multiply
    189,489.20x = 261,499.85 × 107,812.96
  4. Step 4: Simplify right side
    189,489.20x = 28,193,072,868.06
  5. Step 5: Solve for x
    x = 28,193,072,868.06/189,489.20
  6. Step 6: Final answer
    x = 148,784.59

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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.