Home / 126,028,856.80-189,043,285.20-72,131,845.60

Finding the Fourth Proportional to 126,028,856.80, 189,043,285.20 and 72,131,845.60

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Solution

The fourth proportional to 126,028,856.80, 189,043,285.20 and 72,131,845.60 is: 108,197,768.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,028,856.80 : 189,043,285.20 = 72,131,845.60 : x
  2. Step 2: Convert to fraction form
    126,028,856.80/189,043,285.20 = 72,131,845.60/x
  3. Step 3: Cross multiply
    126,028,856.80x = 189,043,285.20 × 72,131,845.60
  4. Step 4: Simplify right side
    126,028,856.80x = 13,636,041,059,763,164
  5. Step 5: Solve for x
    x = 13,636,041,059,763,164/126,028,856.80
  6. Step 6: Final answer
    x = 108,197,768.40

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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.