Home / 127,895.20-192,015.60-81,239.20

Finding the Fourth Proportional to 127,895.20, 192,015.60 and 81,239.20

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Solution

The fourth proportional to 127,895.20, 192,015.60 and 81,239.20 is: 121,968.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,895.20 : 192,015.60 = 81,239.20 : x
  2. Step 2: Convert to fraction form
    127,895.20/192,015.60 = 81,239.20/x
  3. Step 3: Cross multiply
    127,895.20x = 192,015.60 × 81,239.20
  4. Step 4: Simplify right side
    127,895.20x = 15,599,193,731.52
  5. Step 5: Solve for x
    x = 15,599,193,731.52/127,895.20
  6. Step 6: Final answer
    x = 121,968.56

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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.