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Finding the Fourth Proportional to 218,272.55, 301,213.15 and 122,779.33

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Solution

The fourth proportional to 218,272.55, 301,213.15 and 122,779.33 is: 169,433.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,272.55 : 301,213.15 = 122,779.33 : x
  2. Step 2: Convert to fraction form
    218,272.55/301,213.15 = 122,779.33/x
  3. Step 3: Cross multiply
    218,272.55x = 301,213.15 × 122,779.33
  4. Step 4: Simplify right side
    218,272.55x = 36,982,747,684.21
  5. Step 5: Solve for x
    x = 36,982,747,684.21/218,272.55
  6. Step 6: Final answer
    x = 169,433.80

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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.