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Finding the Fourth Proportional to 61,682.78, 85,122.16 and 33,388.40

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Solution

The fourth proportional to 61,682.78, 85,122.16 and 33,388.40 is: 46,075.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,682.78 : 85,122.16 = 33,388.40 : x
  2. Step 2: Convert to fraction form
    61,682.78/85,122.16 = 33,388.40/x
  3. Step 3: Cross multiply
    61,682.78x = 85,122.16 × 33,388.40
  4. Step 4: Simplify right side
    61,682.78x = 2,842,092,726.94
  5. Step 5: Solve for x
    x = 2,842,092,726.94/61,682.78
  6. Step 6: Final answer
    x = 46,075.95

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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.