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Finding the Fourth Proportional to 257,706.91, 386,467.75 and 89,181.49

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Solution

The fourth proportional to 257,706.91, 386,467.75 and 89,181.49 is: 133,740.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,706.91 : 386,467.75 = 89,181.49 : x
  2. Step 2: Convert to fraction form
    257,706.91/386,467.75 = 89,181.49/x
  3. Step 3: Cross multiply
    257,706.91x = 386,467.75 × 89,181.49
  4. Step 4: Simplify right side
    257,706.91x = 34,465,767,403.70
  5. Step 5: Solve for x
    x = 34,465,767,403.70/257,706.91
  6. Step 6: Final answer
    x = 133,740.18

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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.