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Finding the Fourth Proportional to 128,544.80, 192,817.20 and 108,910.40

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Solution

The fourth proportional to 128,544.80, 192,817.20 and 108,910.40 is: 163,365.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,544.80 : 192,817.20 = 108,910.40 : x
  2. Step 2: Convert to fraction form
    128,544.80/192,817.20 = 108,910.40/x
  3. Step 3: Cross multiply
    128,544.80x = 192,817.20 × 108,910.40
  4. Step 4: Simplify right side
    128,544.80x = 20,999,798,378.88
  5. Step 5: Solve for x
    x = 20,999,798,378.88/128,544.80
  6. Step 6: Final answer
    x = 163,365.60

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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.