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Finding the Fourth Proportional to 103,661.32, 155,510.22 and 68,629.64

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Solution

The fourth proportional to 103,661.32, 155,510.22 and 68,629.64 is: 102,956.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,661.32 : 155,510.22 = 68,629.64 : x
  2. Step 2: Convert to fraction form
    103,661.32/155,510.22 = 68,629.64/x
  3. Step 3: Cross multiply
    103,661.32x = 155,510.22 × 68,629.64
  4. Step 4: Simplify right side
    103,661.32x = 10,672,610,414.92
  5. Step 5: Solve for x
    x = 10,672,610,414.92/103,661.32
  6. Step 6: Final answer
    x = 102,956.54

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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.