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Finding the Fourth Proportional to 128,662.64, 192,928.14 and 53,762.34

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Solution

The fourth proportional to 128,662.64, 192,928.14 and 53,762.34 is: 80,616.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,662.64 : 192,928.14 = 53,762.34 : x
  2. Step 2: Convert to fraction form
    128,662.64/192,928.14 = 53,762.34/x
  3. Step 3: Cross multiply
    128,662.64x = 192,928.14 × 53,762.34
  4. Step 4: Simplify right side
    128,662.64x = 10,372,268,258.25
  5. Step 5: Solve for x
    x = 10,372,268,258.25/128,662.64
  6. Step 6: Final answer
    x = 80,616.01

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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.