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Finding the Fourth Proportional to 189,779.65, 261,901.49 and 103,743.39

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Solution

The fourth proportional to 189,779.65, 261,901.49 and 103,743.39 is: 143,168.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,779.65 : 261,901.49 = 103,743.39 : x
  2. Step 2: Convert to fraction form
    189,779.65/261,901.49 = 103,743.39/x
  3. Step 3: Cross multiply
    189,779.65x = 261,901.49 × 103,743.39
  4. Step 4: Simplify right side
    189,779.65x = 27,170,548,418.65
  5. Step 5: Solve for x
    x = 27,170,548,418.65/189,779.65
  6. Step 6: Final answer
    x = 143,168.92

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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.