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Finding the Fourth Proportional to 191,686.60, 287,529.96 and 86,382.52

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Solution

The fourth proportional to 191,686.60, 287,529.96 and 86,382.52 is: 129,573.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,686.60 : 287,529.96 = 86,382.52 : x
  2. Step 2: Convert to fraction form
    191,686.60/287,529.96 = 86,382.52/x
  3. Step 3: Cross multiply
    191,686.60x = 287,529.96 × 86,382.52
  4. Step 4: Simplify right side
    191,686.60x = 24,837,562,520.30
  5. Step 5: Solve for x
    x = 24,837,562,520.30/191,686.60
  6. Step 6: Final answer
    x = 129,573.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.