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Finding the Fourth Proportional to 201,843.75, 278,544.38 and 112,419.75

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Solution

The fourth proportional to 201,843.75, 278,544.38 and 112,419.75 is: 155,139.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,843.75 : 278,544.38 = 112,419.75 : x
  2. Step 2: Convert to fraction form
    201,843.75/278,544.38 = 112,419.75/x
  3. Step 3: Cross multiply
    201,843.75x = 278,544.38 × 112,419.75
  4. Step 4: Simplify right side
    201,843.75x = 31,313,889,563.51
  5. Step 5: Solve for x
    x = 31,313,889,563.51/201,843.75
  6. Step 6: Final answer
    x = 155,139.26

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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.