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Finding the Fourth Proportional to 128,853.59, 193,280.24 and 69,804.59

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Solution

The fourth proportional to 128,853.59, 193,280.24 and 69,804.59 is: 104,706.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,853.59 : 193,280.24 = 69,804.59 : x
  2. Step 2: Convert to fraction form
    128,853.59/193,280.24 = 69,804.59/x
  3. Step 3: Cross multiply
    128,853.59x = 193,280.24 × 69,804.59
  4. Step 4: Simplify right side
    128,853.59x = 13,491,847,116.41
  5. Step 5: Solve for x
    x = 13,491,847,116.41/128,853.59
  6. Step 6: Final answer
    x = 104,706.80

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1.5x scale

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.