Home / 208,183.40-312,420.90-89,939.60

Finding the Fourth Proportional to 208,183.40, 312,420.90 and 89,939.60

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Solution

The fourth proportional to 208,183.40, 312,420.90 and 89,939.60 is: 134,972.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,183.40 : 312,420.90 = 89,939.60 : x
  2. Step 2: Convert to fraction form
    208,183.40/312,420.90 = 89,939.60/x
  3. Step 3: Cross multiply
    208,183.40x = 312,420.90 × 89,939.60
  4. Step 4: Simplify right side
    208,183.40x = 28,099,010,777.64
  5. Step 5: Solve for x
    x = 28,099,010,777.64/208,183.40
  6. Step 6: Final answer
    x = 134,972.39

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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.