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Finding the Fourth Proportional to 191,920.36, 287,913.34 and 65,553.68

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Solution

The fourth proportional to 191,920.36, 287,913.34 and 65,553.68 is: 98,341.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,920.36 : 287,913.34 = 65,553.68 : x
  2. Step 2: Convert to fraction form
    191,920.36/287,913.34 = 65,553.68/x
  3. Step 3: Cross multiply
    191,920.36x = 287,913.34 × 65,553.68
  4. Step 4: Simplify right side
    191,920.36x = 18,873,778,958.09
  5. Step 5: Solve for x
    x = 18,873,778,958.09/191,920.36
  6. Step 6: Final answer
    x = 98,341.72

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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.