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Finding the Fourth Proportional to 201,015.40, 301,085.70 and 121,991.80

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Solution

The fourth proportional to 201,015.40, 301,085.70 and 121,991.80 is: 182,722.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,015.40 : 301,085.70 = 121,991.80 : x
  2. Step 2: Convert to fraction form
    201,015.40/301,085.70 = 121,991.80/x
  3. Step 3: Cross multiply
    201,015.40x = 301,085.70 × 121,991.80
  4. Step 4: Simplify right side
    201,015.40x = 36,729,986,497.26
  5. Step 5: Solve for x
    x = 36,729,986,497.26/201,015.40
  6. Step 6: Final answer
    x = 182,722.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.