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Finding the Fourth Proportional to 191,956.05, 287,810.70 and 79,713.72

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Solution

The fourth proportional to 191,956.05, 287,810.70 and 79,713.72 is: 119,519.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,956.05 : 287,810.70 = 79,713.72 : x
  2. Step 2: Convert to fraction form
    191,956.05/287,810.70 = 79,713.72/x
  3. Step 3: Cross multiply
    191,956.05x = 287,810.70 × 79,713.72
  4. Step 4: Simplify right side
    191,956.05x = 22,942,461,552.80
  5. Step 5: Solve for x
    x = 22,942,461,552.80/191,956.05
  6. Step 6: Final answer
    x = 119,519.35

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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.