Home / 81,274.77-121,960.31-36,900.86

Finding the Fourth Proportional to 81,274.77, 121,960.31 and 36,900.86

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Solution

The fourth proportional to 81,274.77, 121,960.31 and 36,900.86 is: 55,373.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,274.77 : 121,960.31 = 36,900.86 : x
  2. Step 2: Convert to fraction form
    81,274.77/121,960.31 = 36,900.86/x
  3. Step 3: Cross multiply
    81,274.77x = 121,960.31 × 36,900.86
  4. Step 4: Simplify right side
    81,274.77x = 4,500,439,530.56
  5. Step 5: Solve for x
    x = 4,500,439,530.56/81,274.77
  6. Step 6: Final answer
    x = 55,373.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.