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Finding the Fourth Proportional to 128,452.80, 192,679.20 and 125,828.40

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Solution

The fourth proportional to 128,452.80, 192,679.20 and 125,828.40 is: 188,742.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,452.80 : 192,679.20 = 125,828.40 : x
  2. Step 2: Convert to fraction form
    128,452.80/192,679.20 = 125,828.40/x
  3. Step 3: Cross multiply
    128,452.80x = 192,679.20 × 125,828.40
  4. Step 4: Simplify right side
    128,452.80x = 24,244,515,449.28
  5. Step 5: Solve for x
    x = 24,244,515,449.28/128,452.80
  6. Step 6: Final answer
    x = 188,742.60

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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.