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Finding the Fourth Proportional to 120,555.44, 180,868.46 and 53,980.73

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Solution

The fourth proportional to 120,555.44, 180,868.46 and 53,980.73 is: 80,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,555.44 : 180,868.46 = 53,980.73 : x
  2. Step 2: Convert to fraction form
    120,555.44/180,868.46 = 53,980.73/x
  3. Step 3: Cross multiply
    120,555.44x = 180,868.46 × 53,980.73
  4. Step 4: Simplify right side
    120,555.44x = 9,763,411,504.78
  5. Step 5: Solve for x
    x = 9,763,411,504.78/120,555.44
  6. Step 6: Final answer
    x = 80,986.90

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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.