Home / 128,793.20-193,099.80-76,175.60

Finding the Fourth Proportional to 128,793.20, 193,099.80 and 76,175.60

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Solution

The fourth proportional to 128,793.20, 193,099.80 and 76,175.60 is: 114,210.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,793.20 : 193,099.80 = 76,175.60 : x
  2. Step 2: Convert to fraction form
    128,793.20/193,099.80 = 76,175.60/x
  3. Step 3: Cross multiply
    128,793.20x = 193,099.80 × 76,175.60
  4. Step 4: Simplify right side
    128,793.20x = 14,709,493,124.88
  5. Step 5: Solve for x
    x = 14,709,493,124.88/128,793.20
  6. Step 6: Final answer
    x = 114,210.17

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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.