Home / 86,835.78-119,956.14-80,406

Finding the Fourth Proportional to 86,835.78, 119,956.14 and 80,406

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Solution

The fourth proportional to 86,835.78, 119,956.14 and 80,406 is: 111,073.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,835.78 : 119,956.14 = 80,406 : x
  2. Step 2: Convert to fraction form
    86,835.78/119,956.14 = 80,406/x
  3. Step 3: Cross multiply
    86,835.78x = 119,956.14 × 80,406
  4. Step 4: Simplify right side
    86,835.78x = 9,645,193,392.84
  5. Step 5: Solve for x
    x = 9,645,193,392.84/86,835.78
  6. Step 6: Final answer
    x = 111,073.95

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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.