Home / 117,193.29-161,682.12-86,639.78

Finding the Fourth Proportional to 117,193.29, 161,682.12 and 86,639.78

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Solution

The fourth proportional to 117,193.29, 161,682.12 and 86,639.78 is: 119,529.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,193.29 : 161,682.12 = 86,639.78 : x
  2. Step 2: Convert to fraction form
    117,193.29/161,682.12 = 86,639.78/x
  3. Step 3: Cross multiply
    117,193.29x = 161,682.12 × 86,639.78
  4. Step 4: Simplify right side
    117,193.29x = 14,008,102,498.32
  5. Step 5: Solve for x
    x = 14,008,102,498.32/117,193.29
  6. Step 6: Final answer
    x = 119,529.90

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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.