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Finding the Fourth Proportional to 323,412,672.80, 485,119,009.20 and 118,898,429.60

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Solution

The fourth proportional to 323,412,672.80, 485,119,009.20 and 118,898,429.60 is: 178,347,644.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,412,672.80 : 485,119,009.20 = 118,898,429.60 : x
  2. Step 2: Convert to fraction form
    323,412,672.80/485,119,009.20 = 118,898,429.60/x
  3. Step 3: Cross multiply
    323,412,672.80x = 485,119,009.20 × 118,898,429.60
  4. Step 4: Simplify right side
    323,412,672.80x = 57,679,888,362,987,952
  5. Step 5: Solve for x
    x = 57,679,888,362,987,952/323,412,672.80
  6. Step 6: Final answer
    x = 178,347,644.40

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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.