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Finding the Fourth Proportional to 117,702.20, 176,322.90 and 70,815.80

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Solution

The fourth proportional to 117,702.20, 176,322.90 and 70,815.80 is: 106,085.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,702.20 : 176,322.90 = 70,815.80 : x
  2. Step 2: Convert to fraction form
    117,702.20/176,322.90 = 70,815.80/x
  3. Step 3: Cross multiply
    117,702.20x = 176,322.90 × 70,815.80
  4. Step 4: Simplify right side
    117,702.20x = 12,486,447,221.82
  5. Step 5: Solve for x
    x = 12,486,447,221.82/117,702.20
  6. Step 6: Final answer
    x = 106,085.08

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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.