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Finding the Fourth Proportional to 92,405.46, 138,841.74 and 88,668.78

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Solution

The fourth proportional to 92,405.46, 138,841.74 and 88,668.78 is: 133,227.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,405.46 : 138,841.74 = 88,668.78 : x
  2. Step 2: Convert to fraction form
    92,405.46/138,841.74 = 88,668.78/x
  3. Step 3: Cross multiply
    92,405.46x = 138,841.74 × 88,668.78
  4. Step 4: Simplify right side
    92,405.46x = 12,310,927,698.88
  5. Step 5: Solve for x
    x = 12,310,927,698.88/92,405.46
  6. Step 6: Final answer
    x = 133,227.28

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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.