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Finding the Fourth Proportional to 119,857.39, 165,398.01 and 65,408.18

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Solution

The fourth proportional to 119,857.39, 165,398.01 and 65,408.18 is: 90,260.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,857.39 : 165,398.01 = 65,408.18 : x
  2. Step 2: Convert to fraction form
    119,857.39/165,398.01 = 65,408.18/x
  3. Step 3: Cross multiply
    119,857.39x = 165,398.01 × 65,408.18
  4. Step 4: Simplify right side
    119,857.39x = 10,818,381,655.69
  5. Step 5: Solve for x
    x = 10,818,381,655.69/119,857.39
  6. Step 6: Final answer
    x = 90,260.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.