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Finding the Fourth Proportional to 103,633.85, 155,450.78 and 91,969.85

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Solution

The fourth proportional to 103,633.85, 155,450.78 and 91,969.85 is: 137,954.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,633.85 : 155,450.78 = 91,969.85 : x
  2. Step 2: Convert to fraction form
    103,633.85/155,450.78 = 91,969.85/x
  3. Step 3: Cross multiply
    103,633.85x = 155,450.78 × 91,969.85
  4. Step 4: Simplify right side
    103,633.85x = 14,296,784,918.98
  5. Step 5: Solve for x
    x = 14,296,784,918.98/103,633.85
  6. Step 6: Final answer
    x = 137,954.78

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1.5x scale

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.