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Finding the Fourth Proportional to 92,955.60, 128,527.56 and 81,145.80

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Solution

The fourth proportional to 92,955.60, 128,527.56 and 81,145.80 is: 112,198.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,955.60 : 128,527.56 = 81,145.80 : x
  2. Step 2: Convert to fraction form
    92,955.60/128,527.56 = 81,145.80/x
  3. Step 3: Cross multiply
    92,955.60x = 128,527.56 × 81,145.80
  4. Step 4: Simplify right side
    92,955.60x = 10,429,471,678.25
  5. Step 5: Solve for x
    x = 10,429,471,678.25/92,955.60
  6. Step 6: Final answer
    x = 112,198.42

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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.