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Finding the Fourth Proportional to 128,569.66, 177,367.21 and 83,262.25

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Solution

The fourth proportional to 128,569.66, 177,367.21 and 83,262.25 is: 114,863.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,569.66 : 177,367.21 = 83,262.25 : x
  2. Step 2: Convert to fraction form
    128,569.66/177,367.21 = 83,262.25/x
  3. Step 3: Cross multiply
    128,569.66x = 177,367.21 × 83,262.25
  4. Step 4: Simplify right side
    128,569.66x = 14,767,992,980.82
  5. Step 5: Solve for x
    x = 14,767,992,980.82/128,569.66
  6. Step 6: Final answer
    x = 114,863.75

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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.