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Finding the Fourth Proportional to 128,379.96, 192,495.96 and 49,483.80

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Solution

The fourth proportional to 128,379.96, 192,495.96 and 49,483.80 is: 74,197.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,379.96 : 192,495.96 = 49,483.80 : x
  2. Step 2: Convert to fraction form
    128,379.96/192,495.96 = 49,483.80/x
  3. Step 3: Cross multiply
    128,379.96x = 192,495.96 × 49,483.80
  4. Step 4: Simplify right side
    128,379.96x = 9,525,431,585.45
  5. Step 5: Solve for x
    x = 9,525,431,585.45/128,379.96
  6. Step 6: Final answer
    x = 74,197.18

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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.