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Finding the Fourth Proportional to 128,530.16, 192,850.72 and 49,699.92

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Solution

The fourth proportional to 128,530.16, 192,850.72 and 49,699.92 is: 74,571.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,530.16 : 192,850.72 = 49,699.92 : x
  2. Step 2: Convert to fraction form
    128,530.16/192,850.72 = 49,699.92/x
  3. Step 3: Cross multiply
    128,530.16x = 192,850.72 × 49,699.92
  4. Step 4: Simplify right side
    128,530.16x = 9,584,665,355.94
  5. Step 5: Solve for x
    x = 9,584,665,355.94/128,530.16
  6. Step 6: Final answer
    x = 74,571.33

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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.