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Finding the Fourth Proportional to 118,411.70, 177,617.55 and 91,973.30

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Solution

The fourth proportional to 118,411.70, 177,617.55 and 91,973.30 is: 137,959.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,411.70 : 177,617.55 = 91,973.30 : x
  2. Step 2: Convert to fraction form
    118,411.70/177,617.55 = 91,973.30/x
  3. Step 3: Cross multiply
    118,411.70x = 177,617.55 × 91,973.30
  4. Step 4: Simplify right side
    118,411.70x = 16,336,072,211.42
  5. Step 5: Solve for x
    x = 16,336,072,211.42/118,411.70
  6. Step 6: Final answer
    x = 137,959.95

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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.