Home / 419,904,009.60-629,856,014.40-128,816,059.20

Finding the Fourth Proportional to 419,904,009.60, 629,856,014.40 and 128,816,059.20

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Solution

The fourth proportional to 419,904,009.60, 629,856,014.40 and 128,816,059.20 is: 193,224,088.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,904,009.60 : 629,856,014.40 = 128,816,059.20 : x
  2. Step 2: Convert to fraction form
    419,904,009.60/629,856,014.40 = 128,816,059.20/x
  3. Step 3: Cross multiply
    419,904,009.60x = 629,856,014.40 × 128,816,059.20
  4. Step 4: Simplify right side
    419,904,009.60x = 81,135,569,638,426,448
  5. Step 5: Solve for x
    x = 81,135,569,638,426,448/419,904,009.60
  6. Step 6: Final answer
    x = 193,224,088.80

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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.