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Finding the Fourth Proportional to 77,327,728.80, 115,988,968.80 and 19,820,563.80

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Solution

The fourth proportional to 77,327,728.80, 115,988,968.80 and 19,820,563.80 is: 29,730,173.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,327,728.80 : 115,988,968.80 = 19,820,563.80 : x
  2. Step 2: Convert to fraction form
    77,327,728.80/115,988,968.80 = 19,820,563.80/x
  3. Step 3: Cross multiply
    77,327,728.80x = 115,988,968.80 × 19,820,563.80
  4. Step 4: Simplify right side
    77,327,728.80x = 2,298,966,756,196,609.50
  5. Step 5: Solve for x
    x = 2,298,966,756,196,609.50/77,327,728.80
  6. Step 6: Final answer
    x = 29,730,173.02

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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.