Home / 209,919.27-289,729.04-145,563.15

Finding the Fourth Proportional to 209,919.27, 289,729.04 and 145,563.15

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Solution

The fourth proportional to 209,919.27, 289,729.04 and 145,563.15 is: 200,905.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,919.27 : 289,729.04 = 145,563.15 : x
  2. Step 2: Convert to fraction form
    209,919.27/289,729.04 = 145,563.15/x
  3. Step 3: Cross multiply
    209,919.27x = 289,729.04 × 145,563.15
  4. Step 4: Simplify right side
    209,919.27x = 42,173,870,981.06
  5. Step 5: Solve for x
    x = 42,173,870,981.06/209,919.27
  6. Step 6: Final answer
    x = 200,905.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.