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Finding the Fourth Proportional to 218,686.22, 301,797.05 and 121,896.42

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Solution

The fourth proportional to 218,686.22, 301,797.05 and 121,896.42 is: 168,222.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,686.22 : 301,797.05 = 121,896.42 : x
  2. Step 2: Convert to fraction form
    218,686.22/301,797.05 = 121,896.42/x
  3. Step 3: Cross multiply
    218,686.22x = 301,797.05 × 121,896.42
  4. Step 4: Simplify right side
    218,686.22x = 36,787,979,961.56
  5. Step 5: Solve for x
    x = 36,787,979,961.56/218,686.22
  6. Step 6: Final answer
    x = 168,222.67

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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.