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Finding the Fourth Proportional to 228,379.80, 342,110.43 and 128,390.16

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Solution

The fourth proportional to 228,379.80, 342,110.43 and 128,390.16 is: 192,327.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,379.80 : 342,110.43 = 128,390.16 : x
  2. Step 2: Convert to fraction form
    228,379.80/342,110.43 = 128,390.16/x
  3. Step 3: Cross multiply
    228,379.80x = 342,110.43 × 128,390.16
  4. Step 4: Simplify right side
    228,379.80x = 43,923,612,845.37
  5. Step 5: Solve for x
    x = 43,923,612,845.37/228,379.80
  6. Step 6: Final answer
    x = 192,327.05

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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.