Home / 189,780.15-261,902.19-103,743.90

Finding the Fourth Proportional to 189,780.15, 261,902.19 and 103,743.90

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Solution

The fourth proportional to 189,780.15, 261,902.19 and 103,743.90 is: 143,169.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,780.15 : 261,902.19 = 103,743.90 : x
  2. Step 2: Convert to fraction form
    189,780.15/261,902.19 = 103,743.90/x
  3. Step 3: Cross multiply
    189,780.15x = 261,902.19 × 103,743.90
  4. Step 4: Simplify right side
    189,780.15x = 27,170,754,609.14
  5. Step 5: Solve for x
    x = 27,170,754,609.14/189,780.15
  6. Step 6: Final answer
    x = 143,169.63

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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.