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Finding the Fourth Proportional to 136,711.63, 205,198.80 and 66,640.15

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Solution

The fourth proportional to 136,711.63, 205,198.80 and 66,640.15 is: 100,024.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,711.63 : 205,198.80 = 66,640.15 : x
  2. Step 2: Convert to fraction form
    136,711.63/205,198.80 = 66,640.15/x
  3. Step 3: Cross multiply
    136,711.63x = 205,198.80 × 66,640.15
  4. Step 4: Simplify right side
    136,711.63x = 13,674,478,811.82
  5. Step 5: Solve for x
    x = 13,674,478,811.82/136,711.63
  6. Step 6: Final answer
    x = 100,024.25

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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.