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Finding the Fourth Proportional to 128,529.40, 192,822.90 and 49,636.60

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Solution

The fourth proportional to 128,529.40, 192,822.90 and 49,636.60 is: 74,466.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,529.40 : 192,822.90 = 49,636.60 : x
  2. Step 2: Convert to fraction form
    128,529.40/192,822.90 = 49,636.60/x
  3. Step 3: Cross multiply
    128,529.40x = 192,822.90 × 49,636.60
  4. Step 4: Simplify right side
    128,529.40x = 9,571,073,158.14
  5. Step 5: Solve for x
    x = 9,571,073,158.14/128,529.40
  6. Step 6: Final answer
    x = 74,466.02

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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.