Home / 128,569.95-192,863.97-39,811.77

Finding the Fourth Proportional to 128,569.95, 192,863.97 and 39,811.77

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Solution

The fourth proportional to 128,569.95, 192,863.97 and 39,811.77 is: 59,720.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,569.95 : 192,863.97 = 39,811.77 : x
  2. Step 2: Convert to fraction form
    128,569.95/192,863.97 = 39,811.77/x
  3. Step 3: Cross multiply
    128,569.95x = 192,863.97 × 39,811.77
  4. Step 4: Simplify right side
    128,569.95x = 7,678,256,014.93
  5. Step 5: Solve for x
    x = 7,678,256,014.93/128,569.95
  6. Step 6: Final answer
    x = 59,720.46

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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.