Home / 280,485,340.68-420,708,057.32-86,376,515.42

Finding the Fourth Proportional to 280,485,340.68, 420,708,057.32 and 86,376,515.42

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Solution

The fourth proportional to 280,485,340.68, 420,708,057.32 and 86,376,515.42 is: 129,558,628.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,485,340.68 : 420,708,057.32 = 86,376,515.42 : x
  2. Step 2: Convert to fraction form
    280,485,340.68/420,708,057.32 = 86,376,515.42/x
  3. Step 3: Cross multiply
    280,485,340.68x = 420,708,057.32 × 86,376,515.42
  4. Step 4: Simplify right side
    280,485,340.68x = 36,339,296,000,419,224
  5. Step 5: Solve for x
    x = 36,339,296,000,419,224/280,485,340.68
  6. Step 6: Final answer
    x = 129,558,628.31

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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.