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Finding the Fourth Proportional to 258,704.80, 387,590.20 and 108,676.60

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Solution

The fourth proportional to 258,704.80, 387,590.20 and 108,676.60 is: 162,818.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,704.80 : 387,590.20 = 108,676.60 : x
  2. Step 2: Convert to fraction form
    258,704.80/387,590.20 = 108,676.60/x
  3. Step 3: Cross multiply
    258,704.80x = 387,590.20 × 108,676.60
  4. Step 4: Simplify right side
    258,704.80x = 42,121,985,129.32
  5. Step 5: Solve for x
    x = 42,121,985,129.32/258,704.80
  6. Step 6: Final answer
    x = 162,818.72

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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.