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Finding the Fourth Proportional to 128,441.72, 192,662.86 and 69,305.24

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Solution

The fourth proportional to 128,441.72, 192,662.86 and 69,305.24 is: 103,958.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,441.72 : 192,662.86 = 69,305.24 : x
  2. Step 2: Convert to fraction form
    128,441.72/192,662.86 = 69,305.24/x
  3. Step 3: Cross multiply
    128,441.72x = 192,662.86 × 69,305.24
  4. Step 4: Simplify right side
    128,441.72x = 13,352,545,751.39
  5. Step 5: Solve for x
    x = 13,352,545,751.39/128,441.72
  6. Step 6: Final answer
    x = 103,958.01

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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.