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Finding the Fourth Proportional to 128,260.45, 192,222.90 and 68,968.45

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Solution

The fourth proportional to 128,260.45, 192,222.90 and 68,968.45 is: 103,362.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,260.45 : 192,222.90 = 68,968.45 : x
  2. Step 2: Convert to fraction form
    128,260.45/192,222.90 = 68,968.45/x
  3. Step 3: Cross multiply
    128,260.45x = 192,222.90 × 68,968.45
  4. Step 4: Simplify right side
    128,260.45x = 13,257,315,467.51
  5. Step 5: Solve for x
    x = 13,257,315,467.51/128,260.45
  6. Step 6: Final answer
    x = 103,362.46

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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.