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Finding the Fourth Proportional to 68,787.40, 94,920 and 38,573.98

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Solution

The fourth proportional to 68,787.40, 94,920 and 38,573.98 is: 53,228.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,787.40 : 94,920 = 38,573.98 : x
  2. Step 2: Convert to fraction form
    68,787.40/94,920 = 38,573.98/x
  3. Step 3: Cross multiply
    68,787.40x = 94,920 × 38,573.98
  4. Step 4: Simplify right side
    68,787.40x = 3,661,442,181.60
  5. Step 5: Solve for x
    x = 3,661,442,181.60/68,787.40
  6. Step 6: Final answer
    x = 53,228.38

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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.