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Finding the Fourth Proportional to 128,599.76, 177,514.25 and 104,684.91

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Solution

The fourth proportional to 128,599.76, 177,514.25 and 104,684.91 is: 144,503.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,599.76 : 177,514.25 = 104,684.91 : x
  2. Step 2: Convert to fraction form
    128,599.76/177,514.25 = 104,684.91/x
  3. Step 3: Cross multiply
    128,599.76x = 177,514.25 × 104,684.91
  4. Step 4: Simplify right side
    128,599.76x = 18,583,062,761.54
  5. Step 5: Solve for x
    x = 18,583,062,761.54/128,599.76
  6. Step 6: Final answer
    x = 144,503.10

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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.