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Finding the Fourth Proportional to 191,710.90, 287,563.65 and 86,529.70

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Solution

The fourth proportional to 191,710.90, 287,563.65 and 86,529.70 is: 129,793.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,710.90 : 287,563.65 = 86,529.70 : x
  2. Step 2: Convert to fraction form
    191,710.90/287,563.65 = 86,529.70/x
  3. Step 3: Cross multiply
    191,710.90x = 287,563.65 × 86,529.70
  4. Step 4: Simplify right side
    191,710.90x = 24,882,796,365.41
  5. Step 5: Solve for x
    x = 24,882,796,365.41/191,710.90
  6. Step 6: Final answer
    x = 129,793.33

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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.