Home / 128,784.20-193,086.30-76,166.60

Finding the Fourth Proportional to 128,784.20, 193,086.30 and 76,166.60

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Solution

The fourth proportional to 128,784.20, 193,086.30 and 76,166.60 is: 114,196.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,784.20 : 193,086.30 = 76,166.60 : x
  2. Step 2: Convert to fraction form
    128,784.20/193,086.30 = 76,166.60/x
  3. Step 3: Cross multiply
    128,784.20x = 193,086.30 × 76,166.60
  4. Step 4: Simplify right side
    128,784.20x = 14,706,726,977.58
  5. Step 5: Solve for x
    x = 14,706,726,977.58/128,784.20
  6. Step 6: Final answer
    x = 114,196.67

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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.