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Finding the Fourth Proportional to 136,733.60, 205,215.60 and 66,672.80

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Solution

The fourth proportional to 136,733.60, 205,215.60 and 66,672.80 is: 100,065.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,733.60 : 205,215.60 = 66,672.80 : x
  2. Step 2: Convert to fraction form
    136,733.60/205,215.60 = 66,672.80/x
  3. Step 3: Cross multiply
    136,733.60x = 205,215.60 × 66,672.80
  4. Step 4: Simplify right side
    136,733.60x = 13,682,298,655.68
  5. Step 5: Solve for x
    x = 13,682,298,655.68/136,733.60
  6. Step 6: Final answer
    x = 100,065.37

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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.