Home / 81,260.28-121,871.28-45,736.71

Finding the Fourth Proportional to 81,260.28, 121,871.28 and 45,736.71

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Solution

The fourth proportional to 81,260.28, 121,871.28 and 45,736.71 is: 68,594.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,260.28 : 121,871.28 = 45,736.71 : x
  2. Step 2: Convert to fraction form
    81,260.28/121,871.28 = 45,736.71/x
  3. Step 3: Cross multiply
    81,260.28x = 121,871.28 × 45,736.71
  4. Step 4: Simplify right side
    81,260.28x = 5,573,991,390.69
  5. Step 5: Solve for x
    x = 5,573,991,390.69/81,260.28
  6. Step 6: Final answer
    x = 68,594.29

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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.