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Finding the Fourth Proportional to 135,323.60, 186,780.36 and 81,640.40

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Solution

The fourth proportional to 135,323.60, 186,780.36 and 81,640.40 is: 112,684.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,323.60 : 186,780.36 = 81,640.40 : x
  2. Step 2: Convert to fraction form
    135,323.60/186,780.36 = 81,640.40/x
  3. Step 3: Cross multiply
    135,323.60x = 186,780.36 × 81,640.40
  4. Step 4: Simplify right side
    135,323.60x = 15,248,823,302.54
  5. Step 5: Solve for x
    x = 15,248,823,302.54/135,323.60
  6. Step 6: Final answer
    x = 112,684.14

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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.