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Finding the Fourth Proportional to 128,050.80, 192,069.80 and 65,727.60

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Solution

The fourth proportional to 128,050.80, 192,069.80 and 65,727.60 is: 98,588.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,050.80 : 192,069.80 = 65,727.60 : x
  2. Step 2: Convert to fraction form
    128,050.80/192,069.80 = 65,727.60/x
  3. Step 3: Cross multiply
    128,050.80x = 192,069.80 × 65,727.60
  4. Step 4: Simplify right side
    128,050.80x = 12,624,286,986.48
  5. Step 5: Solve for x
    x = 12,624,286,986.48/128,050.80
  6. Step 6: Final answer
    x = 98,588.11

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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.