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Finding the Fourth Proportional to 128,601.90, 177,429.42 and 83,314.80

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Solution

The fourth proportional to 128,601.90, 177,429.42 and 83,314.80 is: 114,947.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,601.90 : 177,429.42 = 83,314.80 : x
  2. Step 2: Convert to fraction form
    128,601.90/177,429.42 = 83,314.80/x
  3. Step 3: Cross multiply
    128,601.90x = 177,429.42 × 83,314.80
  4. Step 4: Simplify right side
    128,601.90x = 14,782,496,641.42
  5. Step 5: Solve for x
    x = 14,782,496,641.42/128,601.90
  6. Step 6: Final answer
    x = 114,947.73

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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.