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Finding the Fourth Proportional to 103,418.88, 155,128.74 and 68,350.74

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Solution

The fourth proportional to 103,418.88, 155,128.74 and 68,350.74 is: 102,526.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,418.88 : 155,128.74 = 68,350.74 : x
  2. Step 2: Convert to fraction form
    103,418.88/155,128.74 = 68,350.74/x
  3. Step 3: Cross multiply
    103,418.88x = 155,128.74 × 68,350.74
  4. Step 4: Simplify right side
    103,418.88x = 10,603,164,174.27
  5. Step 5: Solve for x
    x = 10,603,164,174.27/103,418.88
  6. Step 6: Final answer
    x = 102,526.39

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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.