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Finding the Fourth Proportional to 80,000.78, 120,005.28 and 35,630.66

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Solution

The fourth proportional to 80,000.78, 120,005.28 and 35,630.66 is: 53,447.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,000.78 : 120,005.28 = 35,630.66 : x
  2. Step 2: Convert to fraction form
    80,000.78/120,005.28 = 35,630.66/x
  3. Step 3: Cross multiply
    80,000.78x = 120,005.28 × 35,630.66
  4. Step 4: Simplify right side
    80,000.78x = 4,275,867,329.88
  5. Step 5: Solve for x
    x = 4,275,867,329.88/80,000.78
  6. Step 6: Final answer
    x = 53,447.82

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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.