Home / 136,647.08-188,660.70-85,729.67

Finding the Fourth Proportional to 136,647.08, 188,660.70 and 85,729.67

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Solution

The fourth proportional to 136,647.08, 188,660.70 and 85,729.67 is: 118,361.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,647.08 : 188,660.70 = 85,729.67 : x
  2. Step 2: Convert to fraction form
    136,647.08/188,660.70 = 85,729.67/x
  3. Step 3: Cross multiply
    136,647.08x = 188,660.70 × 85,729.67
  4. Step 4: Simplify right side
    136,647.08x = 16,173,818,609.67
  5. Step 5: Solve for x
    x = 16,173,818,609.67/136,647.08
  6. Step 6: Final answer
    x = 118,361.98

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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.