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Finding the Fourth Proportional to 128,047.20, 192,101.13 and 43,808.28

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Solution

The fourth proportional to 128,047.20, 192,101.13 and 43,808.28 is: 65,722.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,047.20 : 192,101.13 = 43,808.28 : x
  2. Step 2: Convert to fraction form
    128,047.20/192,101.13 = 43,808.28/x
  3. Step 3: Cross multiply
    128,047.20x = 192,101.13 × 43,808.28
  4. Step 4: Simplify right side
    128,047.20x = 8,415,620,091.36
  5. Step 5: Solve for x
    x = 8,415,620,091.36/128,047.20
  6. Step 6: Final answer
    x = 65,722.80

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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.