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Finding the Fourth Proportional to 103,626.90, 155,181.15 and 82,890.90

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Solution

The fourth proportional to 103,626.90, 155,181.15 and 82,890.90 is: 124,129.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,626.90 : 155,181.15 = 82,890.90 : x
  2. Step 2: Convert to fraction form
    103,626.90/155,181.15 = 82,890.90/x
  3. Step 3: Cross multiply
    103,626.90x = 155,181.15 × 82,890.90
  4. Step 4: Simplify right side
    103,626.90x = 12,863,105,186.54
  5. Step 5: Solve for x
    x = 12,863,105,186.54/103,626.90
  6. Step 6: Final answer
    x = 124,129.02

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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.