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Finding the Fourth Proportional to 158,605.71, 218,889.73 and 86,999.58

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Solution

The fourth proportional to 158,605.71, 218,889.73 and 86,999.58 is: 120,067.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,605.71 : 218,889.73 = 86,999.58 : x
  2. Step 2: Convert to fraction form
    158,605.71/218,889.73 = 86,999.58/x
  3. Step 3: Cross multiply
    158,605.71x = 218,889.73 × 86,999.58
  4. Step 4: Simplify right side
    158,605.71x = 19,043,313,639.28
  5. Step 5: Solve for x
    x = 19,043,313,639.28/158,605.71
  6. Step 6: Final answer
    x = 120,067.01

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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.