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Finding the Fourth Proportional to 285,676.20, 428,207.10 and 108,114.60

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Solution

The fourth proportional to 285,676.20, 428,207.10 and 108,114.60 is: 162,055.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,676.20 : 428,207.10 = 108,114.60 : x
  2. Step 2: Convert to fraction form
    285,676.20/428,207.10 = 108,114.60/x
  3. Step 3: Cross multiply
    285,676.20x = 428,207.10 × 108,114.60
  4. Step 4: Simplify right side
    285,676.20x = 46,295,439,333.66
  5. Step 5: Solve for x
    x = 46,295,439,333.66/285,676.20
  6. Step 6: Final answer
    x = 162,055.64

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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.