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Finding the Fourth Proportional to 61,719.78, 85,173.12 and 33,425.40

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Solution

The fourth proportional to 61,719.78, 85,173.12 and 33,425.40 is: 46,126.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,719.78 : 85,173.12 = 33,425.40 : x
  2. Step 2: Convert to fraction form
    61,719.78/85,173.12 = 33,425.40/x
  3. Step 3: Cross multiply
    61,719.78x = 85,173.12 × 33,425.40
  4. Step 4: Simplify right side
    61,719.78x = 2,846,945,605.25
  5. Step 5: Solve for x
    x = 2,846,945,605.25/61,719.78
  6. Step 6: Final answer
    x = 46,126.96

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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.