Home / 419,904,101.70-629,856,152.55-128,768,912.10

Finding the Fourth Proportional to 419,904,101.70, 629,856,152.55 and 128,768,912.10

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Solution

The fourth proportional to 419,904,101.70, 629,856,152.55 and 128,768,912.10 is: 193,153,368.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,101.70 : 629,856,152.55 = 128,768,912.10 : x
  2. Step 2: Convert to fraction form
    419,904,101.70/629,856,152.55 = 128,768,912.10/x
  3. Step 3: Cross multiply
    419,904,101.70x = 629,856,152.55 × 128,768,912.10
  4. Step 4: Simplify right side
    419,904,101.70x = 81,105,891,543,355,136
  5. Step 5: Solve for x
    x = 81,105,891,543,355,136/419,904,101.70
  6. Step 6: Final answer
    x = 193,153,368.15

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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.