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Finding the Fourth Proportional to 120,766.80, 181,150.20 and 92,740.80

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Solution

The fourth proportional to 120,766.80, 181,150.20 and 92,740.80 is: 139,111.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,766.80 : 181,150.20 = 92,740.80 : x
  2. Step 2: Convert to fraction form
    120,766.80/181,150.20 = 92,740.80/x
  3. Step 3: Cross multiply
    120,766.80x = 181,150.20 × 92,740.80
  4. Step 4: Simplify right side
    120,766.80x = 16,800,014,468.16
  5. Step 5: Solve for x
    x = 16,800,014,468.16/120,766.80
  6. Step 6: Final answer
    x = 139,111.20

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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.