Home / 209,005.20-313,507.80-68,745.60

Finding the Fourth Proportional to 209,005.20, 313,507.80 and 68,745.60

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Solution

The fourth proportional to 209,005.20, 313,507.80 and 68,745.60 is: 103,118.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,005.20 : 313,507.80 = 68,745.60 : x
  2. Step 2: Convert to fraction form
    209,005.20/313,507.80 = 68,745.60/x
  3. Step 3: Cross multiply
    209,005.20x = 313,507.80 × 68,745.60
  4. Step 4: Simplify right side
    209,005.20x = 21,552,281,815.68
  5. Step 5: Solve for x
    x = 21,552,281,815.68/209,005.20
  6. Step 6: Final answer
    x = 103,118.40

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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.