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Finding the Fourth Proportional to 128,665.64, 192,932.64 and 53,765.34

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Solution

The fourth proportional to 128,665.64, 192,932.64 and 53,765.34 is: 80,620.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,665.64 : 192,932.64 = 53,765.34 : x
  2. Step 2: Convert to fraction form
    128,665.64/192,932.64 = 53,765.34/x
  3. Step 3: Cross multiply
    128,665.64x = 192,932.64 × 53,765.34
  4. Step 4: Simplify right side
    128,665.64x = 10,373,088,986.70
  5. Step 5: Solve for x
    x = 10,373,088,986.70/128,665.64
  6. Step 6: Final answer
    x = 80,620.51

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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.