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Finding the Fourth Proportional to 136,668.98, 188,603.24 and 76,239.43

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Solution

The fourth proportional to 136,668.98, 188,603.24 and 76,239.43 is: 105,210.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,668.98 : 188,603.24 = 76,239.43 : x
  2. Step 2: Convert to fraction form
    136,668.98/188,603.24 = 76,239.43/x
  3. Step 3: Cross multiply
    136,668.98x = 188,603.24 × 76,239.43
  4. Step 4: Simplify right side
    136,668.98x = 14,379,002,661.05
  5. Step 5: Solve for x
    x = 14,379,002,661.05/136,668.98
  6. Step 6: Final answer
    x = 105,210.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.