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Finding the Fourth Proportional to 136,406.21, 188,246.43 and 75,976.88

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Solution

The fourth proportional to 136,406.21, 188,246.43 and 75,976.88 is: 104,851.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,406.21 : 188,246.43 = 75,976.88 : x
  2. Step 2: Convert to fraction form
    136,406.21/188,246.43 = 75,976.88/x
  3. Step 3: Cross multiply
    136,406.21x = 188,246.43 × 75,976.88
  4. Step 4: Simplify right side
    136,406.21x = 14,302,376,042.65
  5. Step 5: Solve for x
    x = 14,302,376,042.65/136,406.21
  6. Step 6: Final answer
    x = 104,851.36

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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.