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Finding the Fourth Proportional to 189,439.38, 261,407.74 and 104,550.98

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Solution

The fourth proportional to 189,439.38, 261,407.74 and 104,550.98 is: 144,270.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,439.38 : 261,407.74 = 104,550.98 : x
  2. Step 2: Convert to fraction form
    189,439.38/261,407.74 = 104,550.98/x
  3. Step 3: Cross multiply
    189,439.38x = 261,407.74 × 104,550.98
  4. Step 4: Simplify right side
    189,439.38x = 27,330,435,396.59
  5. Step 5: Solve for x
    x = 27,330,435,396.59/189,439.38
  6. Step 6: Final answer
    x = 144,270.08

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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.