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Finding the Fourth Proportional to 128,550.80, 192,840.60 and 39,803.60

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Solution

The fourth proportional to 128,550.80, 192,840.60 and 39,803.60 is: 59,709.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,550.80 : 192,840.60 = 39,803.60 : x
  2. Step 2: Convert to fraction form
    128,550.80/192,840.60 = 39,803.60/x
  3. Step 3: Cross multiply
    128,550.80x = 192,840.60 × 39,803.60
  4. Step 4: Simplify right side
    128,550.80x = 7,675,750,106.16
  5. Step 5: Solve for x
    x = 7,675,750,106.16/128,550.80
  6. Step 6: Final answer
    x = 59,709.86

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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.