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Finding the Fourth Proportional to 201,855.08, 278,546.64 and 121,286

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Solution

The fourth proportional to 201,855.08, 278,546.64 and 121,286 is: 167,366.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,855.08 : 278,546.64 = 121,286 : x
  2. Step 2: Convert to fraction form
    201,855.08/278,546.64 = 121,286/x
  3. Step 3: Cross multiply
    201,855.08x = 278,546.64 × 121,286
  4. Step 4: Simplify right side
    201,855.08x = 33,783,807,779.04
  5. Step 5: Solve for x
    x = 33,783,807,779.04/201,855.08
  6. Step 6: Final answer
    x = 167,366.65

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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.