Home / 139,835.58-192,966.87-81,697.71

Finding the Fourth Proportional to 139,835.58, 192,966.87 and 81,697.71

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Solution

The fourth proportional to 139,835.58, 192,966.87 and 81,697.71 is: 112,739.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,835.58 : 192,966.87 = 81,697.71 : x
  2. Step 2: Convert to fraction form
    139,835.58/192,966.87 = 81,697.71/x
  3. Step 3: Cross multiply
    139,835.58x = 192,966.87 × 81,697.71
  4. Step 4: Simplify right side
    139,835.58x = 15,764,951,384.87
  5. Step 5: Solve for x
    x = 15,764,951,384.87/139,835.58
  6. Step 6: Final answer
    x = 112,739.20

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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.