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Finding the Fourth Proportional to 189,411.94, 261,394.75 and 103,375.62

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Solution

The fourth proportional to 189,411.94, 261,394.75 and 103,375.62 is: 142,661.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,411.94 : 261,394.75 = 103,375.62 : x
  2. Step 2: Convert to fraction form
    189,411.94/261,394.75 = 103,375.62/x
  3. Step 3: Cross multiply
    189,411.94x = 261,394.75 × 103,375.62
  4. Step 4: Simplify right side
    189,411.94x = 27,021,844,346.00
  5. Step 5: Solve for x
    x = 27,021,844,346.00/189,411.94
  6. Step 6: Final answer
    x = 142,661.78

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1.5x scale

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.