Home / 80,528.09-120,792-20,556.55

Finding the Fourth Proportional to 80,528.09, 120,792 and 20,556.55

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Solution

The fourth proportional to 80,528.09, 120,792 and 20,556.55 is: 30,834.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,528.09 : 120,792 = 20,556.55 : x
  2. Step 2: Convert to fraction form
    80,528.09/120,792 = 20,556.55/x
  3. Step 3: Cross multiply
    80,528.09x = 120,792 × 20,556.55
  4. Step 4: Simplify right side
    80,528.09x = 2,483,066,787.60
  5. Step 5: Solve for x
    x = 2,483,066,787.60/80,528.09
  6. Step 6: Final answer
    x = 30,834.79

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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.