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Finding the Fourth Proportional to 128,003.20, 192,004.80 and 57,884.80

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Solution

The fourth proportional to 128,003.20, 192,004.80 and 57,884.80 is: 86,827.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,003.20 : 192,004.80 = 57,884.80 : x
  2. Step 2: Convert to fraction form
    128,003.20/192,004.80 = 57,884.80/x
  3. Step 3: Cross multiply
    128,003.20x = 192,004.80 × 57,884.80
  4. Step 4: Simplify right side
    128,003.20x = 11,114,159,447.04
  5. Step 5: Solve for x
    x = 11,114,159,447.04/128,003.20
  6. Step 6: Final answer
    x = 86,827.20

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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.