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Finding the Fourth Proportional to 118,730.14, 178,114.65 and 56,379.58

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Solution

The fourth proportional to 118,730.14, 178,114.65 and 56,379.58 is: 84,578.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,730.14 : 178,114.65 = 56,379.58 : x
  2. Step 2: Convert to fraction form
    118,730.14/178,114.65 = 56,379.58/x
  3. Step 3: Cross multiply
    118,730.14x = 178,114.65 × 56,379.58
  4. Step 4: Simplify right side
    118,730.14x = 10,042,029,158.85
  5. Step 5: Solve for x
    x = 10,042,029,158.85/118,730.14
  6. Step 6: Final answer
    x = 84,578.60

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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.