Home / 209,311.20-313,965.36-69,081.12

Finding the Fourth Proportional to 209,311.20, 313,965.36 and 69,081.12

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Solution

The fourth proportional to 209,311.20, 313,965.36 and 69,081.12 is: 103,621.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,311.20 : 313,965.36 = 69,081.12 : x
  2. Step 2: Convert to fraction form
    209,311.20/313,965.36 = 69,081.12/x
  3. Step 3: Cross multiply
    209,311.20x = 313,965.36 × 69,081.12
  4. Step 4: Simplify right side
    209,311.20x = 21,689,078,710.00
  5. Step 5: Solve for x
    x = 21,689,078,710.00/209,311.20
  6. Step 6: Final answer
    x = 103,621.20

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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.