Home / 103,639.20-155,420.40-33,520.80

Finding the Fourth Proportional to 103,639.20, 155,420.40 and 33,520.80

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Solution

The fourth proportional to 103,639.20, 155,420.40 and 33,520.80 is: 50,268.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,639.20 : 155,420.40 = 33,520.80 : x
  2. Step 2: Convert to fraction form
    103,639.20/155,420.40 = 33,520.80/x
  3. Step 3: Cross multiply
    103,639.20x = 155,420.40 × 33,520.80
  4. Step 4: Simplify right side
    103,639.20x = 5,209,816,144.32
  5. Step 5: Solve for x
    x = 5,209,816,144.32/103,639.20
  6. Step 6: Final answer
    x = 50,268.78

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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.