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Finding the Fourth Proportional to 209,003.60, 313,505.40 and 68,728.40

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Solution

The fourth proportional to 209,003.60, 313,505.40 and 68,728.40 is: 103,092.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,003.60 : 313,505.40 = 68,728.40 : x
  2. Step 2: Convert to fraction form
    209,003.60/313,505.40 = 68,728.40/x
  3. Step 3: Cross multiply
    209,003.60x = 313,505.40 × 68,728.40
  4. Step 4: Simplify right side
    209,003.60x = 21,546,724,533.36
  5. Step 5: Solve for x
    x = 21,546,724,533.36/209,003.60
  6. Step 6: Final answer
    x = 103,092.60

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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.