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Finding the Fourth Proportional to 128,377.63, 177,185.64 and 86,010.04

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Solution

The fourth proportional to 128,377.63, 177,185.64 and 86,010.04 is: 118,710.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,377.63 : 177,185.64 = 86,010.04 : x
  2. Step 2: Convert to fraction form
    128,377.63/177,185.64 = 86,010.04/x
  3. Step 3: Cross multiply
    128,377.63x = 177,185.64 × 86,010.04
  4. Step 4: Simplify right side
    128,377.63x = 15,239,743,983.83
  5. Step 5: Solve for x
    x = 15,239,743,983.83/128,377.63
  6. Step 6: Final answer
    x = 118,710.28

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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.