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Finding the Fourth Proportional to 61,721.61, 85,175.94 and 33,427.31

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Solution

The fourth proportional to 61,721.61, 85,175.94 and 33,427.31 is: 46,129.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,721.61 : 85,175.94 = 33,427.31 : x
  2. Step 2: Convert to fraction form
    61,721.61/85,175.94 = 33,427.31/x
  3. Step 3: Cross multiply
    61,721.61x = 85,175.94 × 33,427.31
  4. Step 4: Simplify right side
    61,721.61x = 2,847,202,125.04
  5. Step 5: Solve for x
    x = 2,847,202,125.04/61,721.61
  6. Step 6: Final answer
    x = 46,129.74

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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.