Home / 80,743.80-121,115.70-51,219.30

Finding the Fourth Proportional to 80,743.80, 121,115.70 and 51,219.30

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Solution

The fourth proportional to 80,743.80, 121,115.70 and 51,219.30 is: 76,828.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,743.80 : 121,115.70 = 51,219.30 : x
  2. Step 2: Convert to fraction form
    80,743.80/121,115.70 = 51,219.30/x
  3. Step 3: Cross multiply
    80,743.80x = 121,115.70 × 51,219.30
  4. Step 4: Simplify right side
    80,743.80x = 6,203,461,373.01
  5. Step 5: Solve for x
    x = 6,203,461,373.01/80,743.80
  6. Step 6: Final answer
    x = 76,828.95

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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.