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Finding the Fourth Proportional to 158,007.11, 218,049.77 and 86,387.11

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Solution

The fourth proportional to 158,007.11, 218,049.77 and 86,387.11 is: 119,214.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,007.11 : 218,049.77 = 86,387.11 : x
  2. Step 2: Convert to fraction form
    158,007.11/218,049.77 = 86,387.11/x
  3. Step 3: Cross multiply
    158,007.11x = 218,049.77 × 86,387.11
  4. Step 4: Simplify right side
    158,007.11x = 18,836,689,137.31
  5. Step 5: Solve for x
    x = 18,836,689,137.31/158,007.11
  6. Step 6: Final answer
    x = 119,214.19

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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.