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Finding the Fourth Proportional to 80,648.40, 120,943.80 and 28,059.60

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Solution

The fourth proportional to 80,648.40, 120,943.80 and 28,059.60 is: 42,079.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,648.40 : 120,943.80 = 28,059.60 : x
  2. Step 2: Convert to fraction form
    80,648.40/120,943.80 = 28,059.60/x
  3. Step 3: Cross multiply
    80,648.40x = 120,943.80 × 28,059.60
  4. Step 4: Simplify right side
    80,648.40x = 3,393,634,650.48
  5. Step 5: Solve for x
    x = 3,393,634,650.48/80,648.40
  6. Step 6: Final answer
    x = 42,079.38

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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.