Home / 80,822.40-121,255.20-72,117.60

Finding the Fourth Proportional to 80,822.40, 121,255.20 and 72,117.60

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Solution

The fourth proportional to 80,822.40, 121,255.20 and 72,117.60 is: 108,195.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,822.40 : 121,255.20 = 72,117.60 : x
  2. Step 2: Convert to fraction form
    80,822.40/121,255.20 = 72,117.60/x
  3. Step 3: Cross multiply
    80,822.40x = 121,255.20 × 72,117.60
  4. Step 4: Simplify right side
    80,822.40x = 8,744,634,011.52
  5. Step 5: Solve for x
    x = 8,744,634,011.52/80,822.40
  6. Step 6: Final answer
    x = 108,195.67

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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.