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Finding the Fourth Proportional to 128,258.88, 177,006.24 and 83,546.88

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Solution

The fourth proportional to 128,258.88, 177,006.24 and 83,546.88 is: 115,300.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,258.88 : 177,006.24 = 83,546.88 : x
  2. Step 2: Convert to fraction form
    128,258.88/177,006.24 = 83,546.88/x
  3. Step 3: Cross multiply
    128,258.88x = 177,006.24 × 83,546.88
  4. Step 4: Simplify right side
    128,258.88x = 14,788,319,092.53
  5. Step 5: Solve for x
    x = 14,788,319,092.53/128,258.88
  6. Step 6: Final answer
    x = 115,300.55

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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.