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Finding the Fourth Proportional to 61,787.80, 85,245.78 and 36,645.40

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Solution

The fourth proportional to 61,787.80, 85,245.78 and 36,645.40 is: 50,557.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,787.80 : 85,245.78 = 36,645.40 : x
  2. Step 2: Convert to fraction form
    61,787.80/85,245.78 = 36,645.40/x
  3. Step 3: Cross multiply
    61,787.80x = 85,245.78 × 36,645.40
  4. Step 4: Simplify right side
    61,787.80x = 3,123,865,706.41
  5. Step 5: Solve for x
    x = 3,123,865,706.41/61,787.80
  6. Step 6: Final answer
    x = 50,557.97

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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.