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Finding the Fourth Proportional to 186,020.81, 256,717.49 and 105,449.90

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Solution

The fourth proportional to 186,020.81, 256,717.49 and 105,449.90 is: 145,525.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,020.81 : 256,717.49 = 105,449.90 : x
  2. Step 2: Convert to fraction form
    186,020.81/256,717.49 = 105,449.90/x
  3. Step 3: Cross multiply
    186,020.81x = 256,717.49 × 105,449.90
  4. Step 4: Simplify right side
    186,020.81x = 27,070,831,837.91
  5. Step 5: Solve for x
    x = 27,070,831,837.91/186,020.81
  6. Step 6: Final answer
    x = 145,525.83

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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.