Home / 128,190.80-192,280.64-39,440.52

Finding the Fourth Proportional to 128,190.80, 192,280.64 and 39,440.52

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Solution

The fourth proportional to 128,190.80, 192,280.64 and 39,440.52 is: 59,159.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,190.80 : 192,280.64 = 39,440.52 : x
  2. Step 2: Convert to fraction form
    128,190.80/192,280.64 = 39,440.52/x
  3. Step 3: Cross multiply
    128,190.80x = 192,280.64 × 39,440.52
  4. Step 4: Simplify right side
    128,190.80x = 7,583,648,230.33
  5. Step 5: Solve for x
    x = 7,583,648,230.33/128,190.80
  6. Step 6: Final answer
    x = 59,159.07

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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.