Home / 128,310.80-192,466.20-39,556.40

Finding the Fourth Proportional to 128,310.80, 192,466.20 and 39,556.40

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Solution

The fourth proportional to 128,310.80, 192,466.20 and 39,556.40 is: 59,334.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,310.80 : 192,466.20 = 39,556.40 : x
  2. Step 2: Convert to fraction form
    128,310.80/192,466.20 = 39,556.40/x
  3. Step 3: Cross multiply
    128,310.80x = 192,466.20 × 39,556.40
  4. Step 4: Simplify right side
    128,310.80x = 7,613,269,993.68
  5. Step 5: Solve for x
    x = 7,613,269,993.68/128,310.80
  6. Step 6: Final answer
    x = 59,334.60

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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.