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Finding the Fourth Proportional to 128,334.50, 192,534.56 and 53,429.75

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Solution

The fourth proportional to 128,334.50, 192,534.56 and 53,429.75 is: 80,158.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,334.50 : 192,534.56 = 53,429.75 : x
  2. Step 2: Convert to fraction form
    128,334.50/192,534.56 = 53,429.75/x
  3. Step 3: Cross multiply
    128,334.50x = 192,534.56 × 53,429.75
  4. Step 4: Simplify right side
    128,334.50x = 10,287,073,099.70
  5. Step 5: Solve for x
    x = 10,287,073,099.70/128,334.50
  6. Step 6: Final answer
    x = 80,158.28

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.