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Finding the Fourth Proportional to 499,992.75, 749,989.53 and 126,015.75

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Solution

The fourth proportional to 499,992.75, 749,989.53 and 126,015.75 is: 189,023.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,992.75 : 749,989.53 = 126,015.75 : x
  2. Step 2: Convert to fraction form
    499,992.75/749,989.53 = 126,015.75/x
  3. Step 3: Cross multiply
    499,992.75x = 749,989.53 × 126,015.75
  4. Step 4: Simplify right side
    499,992.75x = 94,510,493,115.10
  5. Step 5: Solve for x
    x = 94,510,493,115.10/499,992.75
  6. Step 6: Final answer
    x = 189,023.73

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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.