Home / 81,100.20-121,613.04-45,053.58

Finding the Fourth Proportional to 81,100.20, 121,613.04 and 45,053.58

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Solution

The fourth proportional to 81,100.20, 121,613.04 and 45,053.58 is: 67,559.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,100.20 : 121,613.04 = 45,053.58 : x
  2. Step 2: Convert to fraction form
    81,100.20/121,613.04 = 45,053.58/x
  3. Step 3: Cross multiply
    81,100.20x = 121,613.04 × 45,053.58
  4. Step 4: Simplify right side
    81,100.20x = 5,479,102,826.68
  5. Step 5: Solve for x
    x = 5,479,102,826.68/81,100.20
  6. Step 6: Final answer
    x = 67,559.67

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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.