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Finding the Fourth Proportional to 61,781.88, 85,268.10 and 39,122.94

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Solution

The fourth proportional to 61,781.88, 85,268.10 and 39,122.94 is: 53,995.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,781.88 : 85,268.10 = 39,122.94 : x
  2. Step 2: Convert to fraction form
    61,781.88/85,268.10 = 39,122.94/x
  3. Step 3: Cross multiply
    61,781.88x = 85,268.10 × 39,122.94
  4. Step 4: Simplify right side
    61,781.88x = 3,335,938,760.21
  5. Step 5: Solve for x
    x = 3,335,938,760.21/61,781.88
  6. Step 6: Final answer
    x = 53,995.42

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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.