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Finding the Fourth Proportional to 270,607.80, 405,911.70 and 83,676.60

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Solution

The fourth proportional to 270,607.80, 405,911.70 and 83,676.60 is: 125,514.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,607.80 : 405,911.70 = 83,676.60 : x
  2. Step 2: Convert to fraction form
    270,607.80/405,911.70 = 83,676.60/x
  3. Step 3: Cross multiply
    270,607.80x = 405,911.70 × 83,676.60
  4. Step 4: Simplify right side
    270,607.80x = 33,965,310,956.22
  5. Step 5: Solve for x
    x = 33,965,310,956.22/270,607.80
  6. Step 6: Final answer
    x = 125,514.90

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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.