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Finding the Fourth Proportional to 126,693.81, 189,662.11 and 76,622.45

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Solution

The fourth proportional to 126,693.81, 189,662.11 and 76,622.45 is: 114,704.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,693.81 : 189,662.11 = 76,622.45 : x
  2. Step 2: Convert to fraction form
    126,693.81/189,662.11 = 76,622.45/x
  3. Step 3: Cross multiply
    126,693.81x = 189,662.11 × 76,622.45
  4. Step 4: Simplify right side
    126,693.81x = 14,532,374,400.50
  5. Step 5: Solve for x
    x = 14,532,374,400.50/126,693.81
  6. Step 6: Final answer
    x = 114,704.69

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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.