Home / 103,935.30-155,672.55-80,485.70

Finding the Fourth Proportional to 103,935.30, 155,672.55 and 80,485.70

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Solution

The fourth proportional to 103,935.30, 155,672.55 and 80,485.70 is: 120,550.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,935.30 : 155,672.55 = 80,485.70 : x
  2. Step 2: Convert to fraction form
    103,935.30/155,672.55 = 80,485.70/x
  3. Step 3: Cross multiply
    103,935.30x = 155,672.55 × 80,485.70
  4. Step 4: Simplify right side
    103,935.30x = 12,529,414,157.54
  5. Step 5: Solve for x
    x = 12,529,414,157.54/103,935.30
  6. Step 6: Final answer
    x = 120,550.13

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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.