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Finding the Fourth Proportional to 136,704.90, 188,630.13 and 91,310.07

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Solution

The fourth proportional to 136,704.90, 188,630.13 and 91,310.07 is: 125,992.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,704.90 : 188,630.13 = 91,310.07 : x
  2. Step 2: Convert to fraction form
    136,704.90/188,630.13 = 91,310.07/x
  3. Step 3: Cross multiply
    136,704.90x = 188,630.13 × 91,310.07
  4. Step 4: Simplify right side
    136,704.90x = 17,223,830,374.41
  5. Step 5: Solve for x
    x = 17,223,830,374.41/136,704.90
  6. Step 6: Final answer
    x = 125,992.78

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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.