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Finding the Fourth Proportional to 117,390.77, 161,998.68 and 65,708.11

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Solution

The fourth proportional to 117,390.77, 161,998.68 and 65,708.11 is: 90,676.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,390.77 : 161,998.68 = 65,708.11 : x
  2. Step 2: Convert to fraction form
    117,390.77/161,998.68 = 65,708.11/x
  3. Step 3: Cross multiply
    117,390.77x = 161,998.68 × 65,708.11
  4. Step 4: Simplify right side
    117,390.77x = 10,644,627,534.20
  5. Step 5: Solve for x
    x = 10,644,627,534.20/117,390.77
  6. Step 6: Final answer
    x = 90,676.87

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1.5x scale

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.