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Finding the Fourth Proportional to 191,355.84, 287,035.20 and 66,696.96

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Solution

The fourth proportional to 191,355.84, 287,035.20 and 66,696.96 is: 100,045.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,355.84 : 287,035.20 = 66,696.96 : x
  2. Step 2: Convert to fraction form
    191,355.84/287,035.20 = 66,696.96/x
  3. Step 3: Cross multiply
    191,355.84x = 287,035.20 × 66,696.96
  4. Step 4: Simplify right side
    191,355.84x = 19,144,375,252.99
  5. Step 5: Solve for x
    x = 19,144,375,252.99/191,355.84
  6. Step 6: Final answer
    x = 100,045.94

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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.