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Finding the Fourth Proportional to 118,462.40, 177,728.16 and 55,269.44

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Solution

The fourth proportional to 118,462.40, 177,728.16 and 55,269.44 is: 82,920.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,462.40 : 177,728.16 = 55,269.44 : x
  2. Step 2: Convert to fraction form
    118,462.40/177,728.16 = 55,269.44/x
  3. Step 3: Cross multiply
    118,462.40x = 177,728.16 × 55,269.44
  4. Step 4: Simplify right side
    118,462.40x = 9,822,935,875.43
  5. Step 5: Solve for x
    x = 9,822,935,875.43/118,462.40
  6. Step 6: Final answer
    x = 82,920.28

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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.