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Finding the Fourth Proportional to 186,057.78, 256,751.91 and 105,490.71

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Solution

The fourth proportional to 186,057.78, 256,751.91 and 105,490.71 is: 145,572.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,057.78 : 256,751.91 = 105,490.71 : x
  2. Step 2: Convert to fraction form
    186,057.78/256,751.91 = 105,490.71/x
  3. Step 3: Cross multiply
    186,057.78x = 256,751.91 × 105,490.71
  4. Step 4: Simplify right side
    186,057.78x = 27,084,941,279.76
  5. Step 5: Solve for x
    x = 27,084,941,279.76/186,057.78
  6. Step 6: Final answer
    x = 145,572.74

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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.