Home / 287,362,236.80-431,043,355.20-126,119,100.80

Finding the Fourth Proportional to 287,362,236.80, 431,043,355.20 and 126,119,100.80

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Solution

The fourth proportional to 287,362,236.80, 431,043,355.20 and 126,119,100.80 is: 189,178,651.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,362,236.80 : 431,043,355.20 = 126,119,100.80 : x
  2. Step 2: Convert to fraction form
    287,362,236.80/431,043,355.20 = 126,119,100.80/x
  3. Step 3: Cross multiply
    287,362,236.80x = 431,043,355.20 × 126,119,100.80
  4. Step 4: Simplify right side
    287,362,236.80x = 54,362,800,363,639,000
  5. Step 5: Solve for x
    x = 54,362,800,363,639,000/287,362,236.80
  6. Step 6: Final answer
    x = 189,178,651.20

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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.