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Finding the Fourth Proportional to 79,891.97, 119,829.10 and 28,598.60

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Solution

The fourth proportional to 79,891.97, 119,829.10 and 28,598.60 is: 42,894.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,891.97 : 119,829.10 = 28,598.60 : x
  2. Step 2: Convert to fraction form
    79,891.97/119,829.10 = 28,598.60/x
  3. Step 3: Cross multiply
    79,891.97x = 119,829.10 × 28,598.60
  4. Step 4: Simplify right side
    79,891.97x = 3,426,943,757.12
  5. Step 5: Solve for x
    x = 3,426,943,757.12/79,891.97
  6. Step 6: Final answer
    x = 42,894.72

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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.