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Finding the Fourth Proportional to 98,578.20, 147,672.90 and 59,017.80

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Solution

The fourth proportional to 98,578.20, 147,672.90 and 59,017.80 is: 88,410.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,578.20 : 147,672.90 = 59,017.80 : x
  2. Step 2: Convert to fraction form
    98,578.20/147,672.90 = 59,017.80/x
  3. Step 3: Cross multiply
    98,578.20x = 147,672.90 × 59,017.80
  4. Step 4: Simplify right side
    98,578.20x = 8,715,329,677.62
  5. Step 5: Solve for x
    x = 8,715,329,677.62/98,578.20
  6. Step 6: Final answer
    x = 88,410.31

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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.