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Finding the Fourth Proportional to 103,622.51, 155,433.78 and 68,553.98

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Solution

The fourth proportional to 103,622.51, 155,433.78 and 68,553.98 is: 102,830.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,622.51 : 155,433.78 = 68,553.98 : x
  2. Step 2: Convert to fraction form
    103,622.51/155,433.78 = 68,553.98/x
  3. Step 3: Cross multiply
    103,622.51x = 155,433.78 × 68,553.98
  4. Step 4: Simplify right side
    103,622.51x = 10,655,604,245.44
  5. Step 5: Solve for x
    x = 10,655,604,245.44/103,622.51
  6. Step 6: Final answer
    x = 102,830.98

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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.