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Finding the Fourth Proportional to 61,725, 85,181.10 and 33,431.31

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Solution

The fourth proportional to 61,725, 85,181.10 and 33,431.31 is: 46,135.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,725 : 85,181.10 = 33,431.31 : x
  2. Step 2: Convert to fraction form
    61,725/85,181.10 = 33,431.31/x
  3. Step 3: Cross multiply
    61,725x = 85,181.10 × 33,431.31
  4. Step 4: Simplify right side
    61,725x = 2,847,715,760.24
  5. Step 5: Solve for x
    x = 2,847,715,760.24/61,725
  6. Step 6: Final answer
    x = 46,135.53

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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.