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Finding the Fourth Proportional to 191,791.81, 287,687.71 and 85,150.70

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Solution

The fourth proportional to 191,791.81, 287,687.71 and 85,150.70 is: 127,726.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,791.81 : 287,687.71 = 85,150.70 : x
  2. Step 2: Convert to fraction form
    191,791.81/287,687.71 = 85,150.70/x
  3. Step 3: Cross multiply
    191,791.81x = 287,687.71 × 85,150.70
  4. Step 4: Simplify right side
    191,791.81x = 24,496,808,448.47
  5. Step 5: Solve for x
    x = 24,496,808,448.47/191,791.81
  6. Step 6: Final answer
    x = 127,726.04

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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.