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Finding the Fourth Proportional to 128,435.86, 191,866.22 and 92,591.27

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Solution

The fourth proportional to 128,435.86, 191,866.22 and 92,591.27 is: 138,319.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,435.86 : 191,866.22 = 92,591.27 : x
  2. Step 2: Convert to fraction form
    128,435.86/191,866.22 = 92,591.27/x
  3. Step 3: Cross multiply
    128,435.86x = 191,866.22 × 92,591.27
  4. Step 4: Simplify right side
    128,435.86x = 17,765,136,979.90
  5. Step 5: Solve for x
    x = 17,765,136,979.90/128,435.86
  6. Step 6: Final answer
    x = 138,319.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.