Home / 128,130.41-192,213.98-39,391.36

Finding the Fourth Proportional to 128,130.41, 192,213.98 and 39,391.36

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Solution

The fourth proportional to 128,130.41, 192,213.98 and 39,391.36 is: 59,092.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,130.41 : 192,213.98 = 39,391.36 : x
  2. Step 2: Convert to fraction form
    128,130.41/192,213.98 = 39,391.36/x
  3. Step 3: Cross multiply
    128,130.41x = 192,213.98 × 39,391.36
  4. Step 4: Simplify right side
    128,130.41x = 7,571,570,083.21
  5. Step 5: Solve for x
    x = 7,571,570,083.21/128,130.41
  6. Step 6: Final answer
    x = 59,092.69

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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.