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Finding the Fourth Proportional to 66,878.46, 92,211.57 and 57,787.39

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Solution

The fourth proportional to 66,878.46, 92,211.57 and 57,787.39 is: 79,676.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,878.46 : 92,211.57 = 57,787.39 : x
  2. Step 2: Convert to fraction form
    66,878.46/92,211.57 = 57,787.39/x
  3. Step 3: Cross multiply
    66,878.46x = 92,211.57 × 57,787.39
  4. Step 4: Simplify right side
    66,878.46x = 5,328,666,073.37
  5. Step 5: Solve for x
    x = 5,328,666,073.37/66,878.46
  6. Step 6: Final answer
    x = 79,676.87

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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.