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Finding the Fourth Proportional to 128,282.54, 176,986.49 and 83,017.71

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Solution

The fourth proportional to 128,282.54, 176,986.49 and 83,017.71 is: 114,536.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,282.54 : 176,986.49 = 83,017.71 : x
  2. Step 2: Convert to fraction form
    128,282.54/176,986.49 = 83,017.71/x
  3. Step 3: Cross multiply
    128,282.54x = 176,986.49 × 83,017.71
  4. Step 4: Simplify right side
    128,282.54x = 14,693,012,685.65
  5. Step 5: Solve for x
    x = 14,693,012,685.65/128,282.54
  6. Step 6: Final answer
    x = 114,536.34

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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.