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Finding the Fourth Proportional to 191,957.05, 287,812.20 and 79,714.72

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Solution

The fourth proportional to 191,957.05, 287,812.20 and 79,714.72 is: 119,520.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,957.05 : 287,812.20 = 79,714.72 : x
  2. Step 2: Convert to fraction form
    191,957.05/287,812.20 = 79,714.72/x
  3. Step 3: Cross multiply
    191,957.05x = 287,812.20 × 79,714.72
  4. Step 4: Simplify right side
    191,957.05x = 22,942,868,935.58
  5. Step 5: Solve for x
    x = 22,942,868,935.58/191,957.05
  6. Step 6: Final answer
    x = 119,520.85

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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.