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Finding the Fourth Proportional to 80,600.80, 120,743.54 and 66,389.67

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Solution

The fourth proportional to 80,600.80, 120,743.54 and 66,389.67 is: 99,454.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,600.80 : 120,743.54 = 66,389.67 : x
  2. Step 2: Convert to fraction form
    80,600.80/120,743.54 = 66,389.67/x
  3. Step 3: Cross multiply
    80,600.80x = 120,743.54 × 66,389.67
  4. Step 4: Simplify right side
    80,600.80x = 8,016,124,518.84
  5. Step 5: Solve for x
    x = 8,016,124,518.84/80,600.80
  6. Step 6: Final answer
    x = 99,454.66

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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.