Home / 79,984.76-119,981.50-20,820.60

Finding the Fourth Proportional to 79,984.76, 119,981.50 and 20,820.60

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Solution

The fourth proportional to 79,984.76, 119,981.50 and 20,820.60 is: 31,232.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,984.76 : 119,981.50 = 20,820.60 : x
  2. Step 2: Convert to fraction form
    79,984.76/119,981.50 = 20,820.60/x
  3. Step 3: Cross multiply
    79,984.76x = 119,981.50 × 20,820.60
  4. Step 4: Simplify right side
    79,984.76x = 2,498,086,818.90
  5. Step 5: Solve for x
    x = 2,498,086,818.90/79,984.76
  6. Step 6: Final answer
    x = 31,232.03

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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.