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Finding the Fourth Proportional to 54,573,938.40, 81,892,400.40 and 20,498,728.80

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Solution

The fourth proportional to 54,573,938.40, 81,892,400.40 and 20,498,728.80 is: 30,759,922.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,573,938.40 : 81,892,400.40 = 20,498,728.80 : x
  2. Step 2: Convert to fraction form
    54,573,938.40/81,892,400.40 = 20,498,728.80/x
  3. Step 3: Cross multiply
    54,573,938.40x = 81,892,400.40 × 20,498,728.80
  4. Step 4: Simplify right side
    54,573,938.40x = 1,678,690,106,580,611.75
  5. Step 5: Solve for x
    x = 1,678,690,106,580,611.75/54,573,938.40
  6. Step 6: Final answer
    x = 30,759,922.33

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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.