Home / 80,830.40-121,267.20-72,125.60

Finding the Fourth Proportional to 80,830.40, 121,267.20 and 72,125.60

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Solution

The fourth proportional to 80,830.40, 121,267.20 and 72,125.60 is: 108,207.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,830.40 : 121,267.20 = 72,125.60 : x
  2. Step 2: Convert to fraction form
    80,830.40/121,267.20 = 72,125.60/x
  3. Step 3: Cross multiply
    80,830.40x = 121,267.20 × 72,125.60
  4. Step 4: Simplify right side
    80,830.40x = 8,746,469,560.32
  5. Step 5: Solve for x
    x = 8,746,469,560.32/80,830.40
  6. Step 6: Final answer
    x = 108,207.67

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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.