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Finding the Fourth Proportional to 54,606,625.80, 81,909,938.70 and 49,126,878.60

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Solution

The fourth proportional to 54,606,625.80, 81,909,938.70 and 49,126,878.60 is: 73,690,317.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,606,625.80 : 81,909,938.70 = 49,126,878.60 : x
  2. Step 2: Convert to fraction form
    54,606,625.80/81,909,938.70 = 49,126,878.60/x
  3. Step 3: Cross multiply
    54,606,625.80x = 81,909,938.70 × 49,126,878.60
  4. Step 4: Simplify right side
    54,606,625.80x = 4,023,979,614,648,342
  5. Step 5: Solve for x
    x = 4,023,979,614,648,342/54,606,625.80
  6. Step 6: Final answer
    x = 73,690,317.90

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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.