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Finding the Fourth Proportional to 136,646.83, 188,660.36 and 85,729.37

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Solution

The fourth proportional to 136,646.83, 188,660.36 and 85,729.37 is: 118,361.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,646.83 : 188,660.36 = 85,729.37 : x
  2. Step 2: Convert to fraction form
    136,646.83/188,660.36 = 85,729.37/x
  3. Step 3: Cross multiply
    136,646.83x = 188,660.36 × 85,729.37
  4. Step 4: Simplify right side
    136,646.83x = 16,173,733,806.77
  5. Step 5: Solve for x
    x = 16,173,733,806.77/136,646.83
  6. Step 6: Final answer
    x = 118,361.57

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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.