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Finding the Fourth Proportional to 189,518.52, 261,539.64 and 104,640.96

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Solution

The fourth proportional to 189,518.52, 261,539.64 and 104,640.96 is: 144,406.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,518.52 : 261,539.64 = 104,640.96 : x
  2. Step 2: Convert to fraction form
    189,518.52/261,539.64 = 104,640.96/x
  3. Step 3: Cross multiply
    189,518.52x = 261,539.64 × 104,640.96
  4. Step 4: Simplify right side
    189,518.52x = 27,367,759,007.65
  5. Step 5: Solve for x
    x = 27,367,759,007.65/189,518.52
  6. Step 6: Final answer
    x = 144,406.78

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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.