Home / 139,946.20-209,919.30-86,680.60

Finding the Fourth Proportional to 139,946.20, 209,919.30 and 86,680.60

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Solution

The fourth proportional to 139,946.20, 209,919.30 and 86,680.60 is: 130,020.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,946.20 : 209,919.30 = 86,680.60 : x
  2. Step 2: Convert to fraction form
    139,946.20/209,919.30 = 86,680.60/x
  3. Step 3: Cross multiply
    139,946.20x = 209,919.30 × 86,680.60
  4. Step 4: Simplify right side
    139,946.20x = 18,195,930,875.58
  5. Step 5: Solve for x
    x = 18,195,930,875.58/139,946.20
  6. Step 6: Final answer
    x = 130,020.90

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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.