Home / 128,135.12-192,208.34-39,392.33

Finding the Fourth Proportional to 128,135.12, 192,208.34 and 39,392.33

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Solution

The fourth proportional to 128,135.12, 192,208.34 and 39,392.33 is: 59,090.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,135.12 : 192,208.34 = 39,392.33 : x
  2. Step 2: Convert to fraction form
    128,135.12/192,208.34 = 39,392.33/x
  3. Step 3: Cross multiply
    128,135.12x = 192,208.34 × 39,392.33
  4. Step 4: Simplify right side
    128,135.12x = 7,571,533,495.47
  5. Step 5: Solve for x
    x = 7,571,533,495.47/128,135.12
  6. Step 6: Final answer
    x = 59,090.23

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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.