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Finding the Fourth Proportional to 76,433.80, 114,737.10 and 45,286.60

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Solution

The fourth proportional to 76,433.80, 114,737.10 and 45,286.60 is: 67,981.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,433.80 : 114,737.10 = 45,286.60 : x
  2. Step 2: Convert to fraction form
    76,433.80/114,737.10 = 45,286.60/x
  3. Step 3: Cross multiply
    76,433.80x = 114,737.10 × 45,286.60
  4. Step 4: Simplify right side
    76,433.80x = 5,196,053,152.86
  5. Step 5: Solve for x
    x = 5,196,053,152.86/76,433.80
  6. Step 6: Final answer
    x = 67,981.09

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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.