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Finding the Fourth Proportional to 186,131.88, 256,879.08 and 105,585.48

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Solution

The fourth proportional to 186,131.88, 256,879.08 and 105,585.48 is: 145,717.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,131.88 : 256,879.08 = 105,585.48 : x
  2. Step 2: Convert to fraction form
    186,131.88/256,879.08 = 105,585.48/x
  3. Step 3: Cross multiply
    186,131.88x = 256,879.08 × 105,585.48
  4. Step 4: Simplify right side
    186,131.88x = 27,122,700,963.76
  5. Step 5: Solve for x
    x = 27,122,700,963.76/186,131.88
  6. Step 6: Final answer
    x = 145,717.65

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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.