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Finding the Fourth Proportional to 136,713.63, 205,201.80 and 66,642.15

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Solution

The fourth proportional to 136,713.63, 205,201.80 and 66,642.15 is: 100,027.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,713.63 : 205,201.80 = 66,642.15 : x
  2. Step 2: Convert to fraction form
    136,713.63/205,201.80 = 66,642.15/x
  3. Step 3: Cross multiply
    136,713.63x = 205,201.80 × 66,642.15
  4. Step 4: Simplify right side
    136,713.63x = 13,675,089,135.87
  5. Step 5: Solve for x
    x = 13,675,089,135.87/136,713.63
  6. Step 6: Final answer
    x = 100,027.26

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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.