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Finding the Fourth Proportional to 103,790.70, 155,685.99 and 74,266.20

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Solution

The fourth proportional to 103,790.70, 155,685.99 and 74,266.20 is: 111,399.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,790.70 : 155,685.99 = 74,266.20 : x
  2. Step 2: Convert to fraction form
    103,790.70/155,685.99 = 74,266.20/x
  3. Step 3: Cross multiply
    103,790.70x = 155,685.99 × 74,266.20
  4. Step 4: Simplify right side
    103,790.70x = 11,562,206,870.54
  5. Step 5: Solve for x
    x = 11,562,206,870.54/103,790.70
  6. Step 6: Final answer
    x = 111,399.26

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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.