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Finding the Fourth Proportional to 128,588.88, 177,411.64 and 83,301.58

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Solution

The fourth proportional to 128,588.88, 177,411.64 and 83,301.58 is: 114,929.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,588.88 : 177,411.64 = 83,301.58 : x
  2. Step 2: Convert to fraction form
    128,588.88/177,411.64 = 83,301.58/x
  3. Step 3: Cross multiply
    128,588.88x = 177,411.64 × 83,301.58
  4. Step 4: Simplify right side
    128,588.88x = 14,778,669,922.39
  5. Step 5: Solve for x
    x = 14,778,669,922.39/128,588.88
  6. Step 6: Final answer
    x = 114,929.61

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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.