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Finding the Fourth Proportional to 61,615.78, 85,029.78 and 33,321.46

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Solution

The fourth proportional to 61,615.78, 85,029.78 and 33,321.46 is: 45,983.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,615.78 : 85,029.78 = 33,321.46 : x
  2. Step 2: Convert to fraction form
    61,615.78/85,029.78 = 33,321.46/x
  3. Step 3: Cross multiply
    61,615.78x = 85,029.78 × 33,321.46
  4. Step 4: Simplify right side
    61,615.78x = 2,833,316,413.08
  5. Step 5: Solve for x
    x = 2,833,316,413.08/61,615.78
  6. Step 6: Final answer
    x = 45,983.62

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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.