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Finding the Fourth Proportional to 99,768,640.80, 149,702,727.60 and 56,670,938.40

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Solution

The fourth proportional to 99,768,640.80, 149,702,727.60 and 56,670,938.40 is: 85,034,676.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,768,640.80 : 149,702,727.60 = 56,670,938.40 : x
  2. Step 2: Convert to fraction form
    99,768,640.80/149,702,727.60 = 56,670,938.40/x
  3. Step 3: Cross multiply
    99,768,640.80x = 149,702,727.60 × 56,670,938.40
  4. Step 4: Simplify right side
    99,768,640.80x = 8,483,794,054,131,579
  5. Step 5: Solve for x
    x = 8,483,794,054,131,579/99,768,640.80
  6. Step 6: Final answer
    x = 85,034,676.09

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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.