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Finding the Fourth Proportional to 128,706.83, 177,608.17 and 75,000.59

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Solution

The fourth proportional to 128,706.83, 177,608.17 and 75,000.59 is: 103,496.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,706.83 : 177,608.17 = 75,000.59 : x
  2. Step 2: Convert to fraction form
    128,706.83/177,608.17 = 75,000.59/x
  3. Step 3: Cross multiply
    128,706.83x = 177,608.17 × 75,000.59
  4. Step 4: Simplify right side
    128,706.83x = 13,320,717,795.34
  5. Step 5: Solve for x
    x = 13,320,717,795.34/128,706.83
  6. Step 6: Final answer
    x = 103,496.59

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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.