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Finding the Fourth Proportional to 80,700.50, 121,225.90 and 68,245.52

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Solution

The fourth proportional to 80,700.50, 121,225.90 and 68,245.52 is: 102,516.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,700.50 : 121,225.90 = 68,245.52 : x
  2. Step 2: Convert to fraction form
    80,700.50/121,225.90 = 68,245.52/x
  3. Step 3: Cross multiply
    80,700.50x = 121,225.90 × 68,245.52
  4. Step 4: Simplify right side
    80,700.50x = 8,273,124,582.97
  5. Step 5: Solve for x
    x = 8,273,124,582.97/80,700.50
  6. Step 6: Final answer
    x = 102,516.40

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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.