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Finding the Fourth Proportional to 74,474.53, 102,676.11 and 61,680.58

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Solution

The fourth proportional to 74,474.53, 102,676.11 and 61,680.58 is: 85,037.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,474.53 : 102,676.11 = 61,680.58 : x
  2. Step 2: Convert to fraction form
    74,474.53/102,676.11 = 61,680.58/x
  3. Step 3: Cross multiply
    74,474.53x = 102,676.11 × 61,680.58
  4. Step 4: Simplify right side
    74,474.53x = 6,333,122,016.94
  5. Step 5: Solve for x
    x = 6,333,122,016.94/74,474.53
  6. Step 6: Final answer
    x = 85,037.42

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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.