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Finding the Fourth Proportional to 208,626.60, 287,883.54 and 128,057.52

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Solution

The fourth proportional to 208,626.60, 287,883.54 and 128,057.52 is: 176,706.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,626.60 : 287,883.54 = 128,057.52 : x
  2. Step 2: Convert to fraction form
    208,626.60/287,883.54 = 128,057.52/x
  3. Step 3: Cross multiply
    208,626.60x = 287,883.54 × 128,057.52
  4. Step 4: Simplify right side
    208,626.60x = 36,865,652,181.22
  5. Step 5: Solve for x
    x = 36,865,652,181.22/208,626.60
  6. Step 6: Final answer
    x = 176,706.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.