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Finding the Fourth Proportional to 61,431.78, 92,169 and 37,891.56

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Solution

The fourth proportional to 61,431.78, 92,169 and 37,891.56 is: 56,850.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,431.78 : 92,169 = 37,891.56 : x
  2. Step 2: Convert to fraction form
    61,431.78/92,169 = 37,891.56/x
  3. Step 3: Cross multiply
    61,431.78x = 92,169 × 37,891.56
  4. Step 4: Simplify right side
    61,431.78x = 3,492,427,193.64
  5. Step 5: Solve for x
    x = 3,492,427,193.64/61,431.78
  6. Step 6: Final answer
    x = 56,850.50

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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.