Home / 209,157.81-313,744.07-67,007.40

Finding the Fourth Proportional to 209,157.81, 313,744.07 and 67,007.40

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Solution

The fourth proportional to 209,157.81, 313,744.07 and 67,007.40 is: 100,513.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,157.81 : 313,744.07 = 67,007.40 : x
  2. Step 2: Convert to fraction form
    209,157.81/313,744.07 = 67,007.40/x
  3. Step 3: Cross multiply
    209,157.81x = 313,744.07 × 67,007.40
  4. Step 4: Simplify right side
    209,157.81x = 21,023,174,396.12
  5. Step 5: Solve for x
    x = 21,023,174,396.12/209,157.81
  6. Step 6: Final answer
    x = 100,513.46

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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.