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Finding the Fourth Proportional to 136,660.80, 204,991.20 and 89,966.40

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Solution

The fourth proportional to 136,660.80, 204,991.20 and 89,966.40 is: 134,949.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,660.80 : 204,991.20 = 89,966.40 : x
  2. Step 2: Convert to fraction form
    136,660.80/204,991.20 = 89,966.40/x
  3. Step 3: Cross multiply
    136,660.80x = 204,991.20 × 89,966.40
  4. Step 4: Simplify right side
    136,660.80x = 18,442,320,295.68
  5. Step 5: Solve for x
    x = 18,442,320,295.68/136,660.80
  6. Step 6: Final answer
    x = 134,949.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.