Home / 80,786.40-121,165.20-51,151.20

Finding the Fourth Proportional to 80,786.40, 121,165.20 and 51,151.20

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Solution

The fourth proportional to 80,786.40, 121,165.20 and 51,151.20 is: 76,717.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,786.40 : 121,165.20 = 51,151.20 : x
  2. Step 2: Convert to fraction form
    80,786.40/121,165.20 = 51,151.20/x
  3. Step 3: Cross multiply
    80,786.40x = 121,165.20 × 51,151.20
  4. Step 4: Simplify right side
    80,786.40x = 6,197,745,378.24
  5. Step 5: Solve for x
    x = 6,197,745,378.24/80,786.40
  6. Step 6: Final answer
    x = 76,717.68

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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.