Home / 419,485,488.72-629,253,455.06-128,355,133.75

Finding the Fourth Proportional to 419,485,488.72, 629,253,455.06 and 128,355,133.75

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Solution

The fourth proportional to 419,485,488.72, 629,253,455.06 and 128,355,133.75 is: 192,540,418.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,485,488.72 : 629,253,455.06 = 128,355,133.75 : x
  2. Step 2: Convert to fraction form
    419,485,488.72/629,253,455.06 = 128,355,133.75/x
  3. Step 3: Cross multiply
    419,485,488.72x = 629,253,455.06 × 128,355,133.75
  4. Step 4: Simplify right side
    419,485,488.72x = 80,767,911,387,807,264
  5. Step 5: Solve for x
    x = 80,767,911,387,807,264/419,485,488.72
  6. Step 6: Final answer
    x = 192,540,418.11

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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.