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Finding the Fourth Proportional to 137,538.86, 189,804.11 and 86,585.30

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Solution

The fourth proportional to 137,538.86, 189,804.11 and 86,585.30 is: 119,488.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,538.86 : 189,804.11 = 86,585.30 : x
  2. Step 2: Convert to fraction form
    137,538.86/189,804.11 = 86,585.30/x
  3. Step 3: Cross multiply
    137,538.86x = 189,804.11 × 86,585.30
  4. Step 4: Simplify right side
    137,538.86x = 16,434,246,690.09
  5. Step 5: Solve for x
    x = 16,434,246,690.09/137,538.86
  6. Step 6: Final answer
    x = 119,488.02

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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.