Home / 201,749.10-278,438.22-121,218.90

Finding the Fourth Proportional to 201,749.10, 278,438.22 and 121,218.90

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Solution

The fourth proportional to 201,749.10, 278,438.22 and 121,218.90 is: 167,296.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,749.10 : 278,438.22 = 121,218.90 : x
  2. Step 2: Convert to fraction form
    201,749.10/278,438.22 = 121,218.90/x
  3. Step 3: Cross multiply
    201,749.10x = 278,438.22 × 121,218.90
  4. Step 4: Simplify right side
    201,749.10x = 33,751,974,746.36
  5. Step 5: Solve for x
    x = 33,751,974,746.36/201,749.10
  6. Step 6: Final answer
    x = 167,296.78

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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.