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Finding the Fourth Proportional to 70,183.31, 96,858.72 and 39,978.09

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Solution

The fourth proportional to 70,183.31, 96,858.72 and 39,978.09 is: 55,173.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,183.31 : 96,858.72 = 39,978.09 : x
  2. Step 2: Convert to fraction form
    70,183.31/96,858.72 = 39,978.09/x
  3. Step 3: Cross multiply
    70,183.31x = 96,858.72 × 39,978.09
  4. Step 4: Simplify right side
    70,183.31x = 3,872,226,625.44
  5. Step 5: Solve for x
    x = 3,872,226,625.44/70,183.31
  6. Step 6: Final answer
    x = 55,173.04

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1.5x scale

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.