Home / 139,977.28-193,172.30-86,297.76

Finding the Fourth Proportional to 139,977.28, 193,172.30 and 86,297.76

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Solution

The fourth proportional to 139,977.28, 193,172.30 and 86,297.76 is: 119,093.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,977.28 : 193,172.30 = 86,297.76 : x
  2. Step 2: Convert to fraction form
    139,977.28/193,172.30 = 86,297.76/x
  3. Step 3: Cross multiply
    139,977.28x = 193,172.30 × 86,297.76
  4. Step 4: Simplify right side
    139,977.28x = 16,670,336,784.05
  5. Step 5: Solve for x
    x = 16,670,336,784.05/139,977.28
  6. Step 6: Final answer
    x = 119,093.16

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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.