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Finding the Fourth Proportional to 158,434.56, 218,635.92 and 86,811.12

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Solution

The fourth proportional to 158,434.56, 218,635.92 and 86,811.12 is: 119,797.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,434.56 : 218,635.92 = 86,811.12 : x
  2. Step 2: Convert to fraction form
    158,434.56/218,635.92 = 86,811.12/x
  3. Step 3: Cross multiply
    158,434.56x = 218,635.92 × 86,811.12
  4. Step 4: Simplify right side
    158,434.56x = 18,980,029,087.43
  5. Step 5: Solve for x
    x = 18,980,029,087.43/158,434.56
  6. Step 6: Final answer
    x = 119,797.28

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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.