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Finding the Fourth Proportional to 61,420.31, 91,939.77 and 33,270.47

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Solution

The fourth proportional to 61,420.31, 91,939.77 and 33,270.47 is: 49,802.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,420.31 : 91,939.77 = 33,270.47 : x
  2. Step 2: Convert to fraction form
    61,420.31/91,939.77 = 33,270.47/x
  3. Step 3: Cross multiply
    61,420.31x = 91,939.77 × 33,270.47
  4. Step 4: Simplify right side
    61,420.31x = 3,058,878,899.89
  5. Step 5: Solve for x
    x = 3,058,878,899.89/61,420.31
  6. Step 6: Final answer
    x = 49,802.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.