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Finding the Fourth Proportional to 309,757.57, 464,641.44 and 85,116.60

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Solution

The fourth proportional to 309,757.57, 464,641.44 and 85,116.60 is: 127,676.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,757.57 : 464,641.44 = 85,116.60 : x
  2. Step 2: Convert to fraction form
    309,757.57/464,641.44 = 85,116.60/x
  3. Step 3: Cross multiply
    309,757.57x = 464,641.44 × 85,116.60
  4. Step 4: Simplify right side
    309,757.57x = 39,548,698,205.30
  5. Step 5: Solve for x
    x = 39,548,698,205.30/309,757.57
  6. Step 6: Final answer
    x = 127,676.29

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1.5x scale

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.