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Finding the Fourth Proportional to 191,910.72, 287,869.68 and 65,579.88

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Solution

The fourth proportional to 191,910.72, 287,869.68 and 65,579.88 is: 98,371.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,910.72 : 287,869.68 = 65,579.88 : x
  2. Step 2: Convert to fraction form
    191,910.72/287,869.68 = 65,579.88/x
  3. Step 3: Cross multiply
    191,910.72x = 287,869.68 × 65,579.88
  4. Step 4: Simplify right side
    191,910.72x = 18,878,459,070.04
  5. Step 5: Solve for x
    x = 18,878,459,070.04/191,910.72
  6. Step 6: Final answer
    x = 98,371.05

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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.