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Finding the Fourth Proportional to 191,604.88, 287,111.67 and 121,336.57

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Solution

The fourth proportional to 191,604.88, 287,111.67 and 121,336.57 is: 181,817.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,604.88 : 287,111.67 = 121,336.57 : x
  2. Step 2: Convert to fraction form
    191,604.88/287,111.67 = 121,336.57/x
  3. Step 3: Cross multiply
    191,604.88x = 287,111.67 × 121,336.57
  4. Step 4: Simplify right side
    191,604.88x = 34,837,145,244.77
  5. Step 5: Solve for x
    x = 34,837,145,244.77/191,604.88
  6. Step 6: Final answer
    x = 181,817.63

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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.