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Finding the Fourth Proportional to 71,113.64, 98,586.12 and 67,321.46

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Solution

The fourth proportional to 71,113.64, 98,586.12 and 67,321.46 is: 93,328.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,113.64 : 98,586.12 = 67,321.46 : x
  2. Step 2: Convert to fraction form
    71,113.64/98,586.12 = 67,321.46/x
  3. Step 3: Cross multiply
    71,113.64x = 98,586.12 × 67,321.46
  4. Step 4: Simplify right side
    71,113.64x = 6,636,961,041.20
  5. Step 5: Solve for x
    x = 6,636,961,041.20/71,113.64
  6. Step 6: Final answer
    x = 93,328.95

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.