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Finding the Fourth Proportional to 68,902.40, 103,414.35 and 40,787.30

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Solution

The fourth proportional to 68,902.40, 103,414.35 and 40,787.30 is: 61,216.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,902.40 : 103,414.35 = 40,787.30 : x
  2. Step 2: Convert to fraction form
    68,902.40/103,414.35 = 40,787.30/x
  3. Step 3: Cross multiply
    68,902.40x = 103,414.35 × 40,787.30
  4. Step 4: Simplify right side
    68,902.40x = 4,217,992,117.76
  5. Step 5: Solve for x
    x = 4,217,992,117.76/68,902.40
  6. Step 6: Final answer
    x = 61,216.91

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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.