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Finding the Fourth Proportional to 72,691,105.80, 109,036,658.70 and 48,504,635.40

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Solution

The fourth proportional to 72,691,105.80, 109,036,658.70 and 48,504,635.40 is: 72,756,953.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,691,105.80 : 109,036,658.70 = 48,504,635.40 : x
  2. Step 2: Convert to fraction form
    72,691,105.80/109,036,658.70 = 48,504,635.40/x
  3. Step 3: Cross multiply
    72,691,105.80x = 109,036,658.70 × 48,504,635.40
  4. Step 4: Simplify right side
    72,691,105.80x = 5,288,783,375,477,738
  5. Step 5: Solve for x
    x = 5,288,783,375,477,738/72,691,105.80
  6. Step 6: Final answer
    x = 72,756,953.10

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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.