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Finding the Fourth Proportional to 189,805.66, 261,921.52 and 104,917.25

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Solution

The fourth proportional to 189,805.66, 261,921.52 and 104,917.25 is: 144,780.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,805.66 : 261,921.52 = 104,917.25 : x
  2. Step 2: Convert to fraction form
    189,805.66/261,921.52 = 104,917.25/x
  3. Step 3: Cross multiply
    189,805.66x = 261,921.52 × 104,917.25
  4. Step 4: Simplify right side
    189,805.66x = 27,480,085,594.22
  5. Step 5: Solve for x
    x = 27,480,085,594.22/189,805.66
  6. Step 6: Final answer
    x = 144,780.12

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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.