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Finding the Fourth Proportional to 218,644.55, 301,725.37 and 121,846.28

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Solution

The fourth proportional to 218,644.55, 301,725.37 and 121,846.28 is: 168,145.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,644.55 : 301,725.37 = 121,846.28 : x
  2. Step 2: Convert to fraction form
    218,644.55/301,725.37 = 121,846.28/x
  3. Step 3: Cross multiply
    218,644.55x = 301,725.37 × 121,846.28
  4. Step 4: Simplify right side
    218,644.55x = 36,764,112,559.80
  5. Step 5: Solve for x
    x = 36,764,112,559.80/218,644.55
  6. Step 6: Final answer
    x = 168,145.57

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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.