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Finding the Fourth Proportional to 191,808.92, 287,758.74 and 86,627.18

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Solution

The fourth proportional to 191,808.92, 287,758.74 and 86,627.18 is: 129,961.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,808.92 : 287,758.74 = 86,627.18 : x
  2. Step 2: Convert to fraction form
    191,808.92/287,758.74 = 86,627.18/x
  3. Step 3: Cross multiply
    191,808.92x = 287,758.74 × 86,627.18
  4. Step 4: Simplify right side
    191,808.92x = 24,927,728,166.55
  5. Step 5: Solve for x
    x = 24,927,728,166.55/191,808.92
  6. Step 6: Final answer
    x = 129,961.26

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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.