Home / 78,079.68-117,106.20-28,149.84

Finding the Fourth Proportional to 78,079.68, 117,106.20 and 28,149.84

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Solution

The fourth proportional to 78,079.68, 117,106.20 and 28,149.84 is: 42,219.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,079.68 : 117,106.20 = 28,149.84 : x
  2. Step 2: Convert to fraction form
    78,079.68/117,106.20 = 28,149.84/x
  3. Step 3: Cross multiply
    78,079.68x = 117,106.20 × 28,149.84
  4. Step 4: Simplify right side
    78,079.68x = 3,296,520,793.01
  5. Step 5: Solve for x
    x = 3,296,520,793.01/78,079.68
  6. Step 6: Final answer
    x = 42,219.96

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1.5x scale

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.