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Finding the Fourth Proportional to 127,612.93, 191,428.21 and 43,338.71

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Solution

The fourth proportional to 127,612.93, 191,428.21 and 43,338.71 is: 65,011.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,612.93 : 191,428.21 = 43,338.71 : x
  2. Step 2: Convert to fraction form
    127,612.93/191,428.21 = 43,338.71/x
  3. Step 3: Cross multiply
    127,612.93x = 191,428.21 × 43,338.71
  4. Step 4: Simplify right side
    127,612.93x = 8,296,251,679.01
  5. Step 5: Solve for x
    x = 8,296,251,679.01/127,612.93
  6. Step 6: Final answer
    x = 65,011.06

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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.