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Finding the Fourth Proportional to 128,137.88, 192,275.74 and 53,309.64

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Solution

The fourth proportional to 128,137.88, 192,275.74 and 53,309.64 is: 79,993.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,137.88 : 192,275.74 = 53,309.64 : x
  2. Step 2: Convert to fraction form
    128,137.88/192,275.74 = 53,309.64/x
  3. Step 3: Cross multiply
    128,137.88x = 192,275.74 × 53,309.64
  4. Step 4: Simplify right side
    128,137.88x = 10,250,150,480.13
  5. Step 5: Solve for x
    x = 10,250,150,480.13/128,137.88
  6. Step 6: Final answer
    x = 79,993.13

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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.