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Finding the Fourth Proportional to 103,620.10, 155,506.95 and 68,548.10

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Solution

The fourth proportional to 103,620.10, 155,506.95 and 68,548.10 is: 102,872.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,620.10 : 155,506.95 = 68,548.10 : x
  2. Step 2: Convert to fraction form
    103,620.10/155,506.95 = 68,548.10/x
  3. Step 3: Cross multiply
    103,620.10x = 155,506.95 × 68,548.10
  4. Step 4: Simplify right side
    103,620.10x = 10,659,705,959.30
  5. Step 5: Solve for x
    x = 10,659,705,959.30/103,620.10
  6. Step 6: Final answer
    x = 102,872.96

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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.