Home / 419,345,663.58-629,018,495.16-128,212,786.72

Finding the Fourth Proportional to 419,345,663.58, 629,018,495.16 and 128,212,786.72

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Solution

The fourth proportional to 419,345,663.58, 629,018,495.16 and 128,212,786.72 is: 192,319,180.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,345,663.58 : 629,018,495.16 = 128,212,786.72 : x
  2. Step 2: Convert to fraction form
    419,345,663.58/629,018,495.16 = 128,212,786.72/x
  3. Step 3: Cross multiply
    419,345,663.58x = 629,018,495.16 × 128,212,786.72
  4. Step 4: Simplify right side
    419,345,663.58x = 80,648,214,162,884,432
  5. Step 5: Solve for x
    x = 80,648,214,162,884,432/419,345,663.58
  6. Step 6: Final answer
    x = 192,319,180.02

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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.