Home / 209,112.21-313,492.01-90,694.40

Finding the Fourth Proportional to 209,112.21, 313,492.01 and 90,694.40

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Solution

The fourth proportional to 209,112.21, 313,492.01 and 90,694.40 is: 135,965.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,112.21 : 313,492.01 = 90,694.40 : x
  2. Step 2: Convert to fraction form
    209,112.21/313,492.01 = 90,694.40/x
  3. Step 3: Cross multiply
    209,112.21x = 313,492.01 × 90,694.40
  4. Step 4: Simplify right side
    209,112.21x = 28,431,967,730.81
  5. Step 5: Solve for x
    x = 28,431,967,730.81/209,112.21
  6. Step 6: Final answer
    x = 135,965.12

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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.