Home / 128,200.80-192,301.20-113,438.55

Finding the Fourth Proportional to 128,200.80, 192,301.20 and 113,438.55

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Solution

The fourth proportional to 128,200.80, 192,301.20 and 113,438.55 is: 170,157.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,200.80 : 192,301.20 = 113,438.55 : x
  2. Step 2: Convert to fraction form
    128,200.80/192,301.20 = 113,438.55/x
  3. Step 3: Cross multiply
    128,200.80x = 192,301.20 × 113,438.55
  4. Step 4: Simplify right side
    128,200.80x = 21,814,369,291.26
  5. Step 5: Solve for x
    x = 21,814,369,291.26/128,200.80
  6. Step 6: Final answer
    x = 170,157.83

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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.