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Finding the Fourth Proportional to 201,907.80, 278,633.16 and 121,336.56

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Solution

The fourth proportional to 201,907.80, 278,633.16 and 121,336.56 is: 167,444.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,907.80 : 278,633.16 = 121,336.56 : x
  2. Step 2: Convert to fraction form
    201,907.80/278,633.16 = 121,336.56/x
  3. Step 3: Cross multiply
    201,907.80x = 278,633.16 × 121,336.56
  4. Step 4: Simplify right side
    201,907.80x = 33,808,389,136.33
  5. Step 5: Solve for x
    x = 33,808,389,136.33/201,907.80
  6. Step 6: Final answer
    x = 167,444.69

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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.