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Finding the Fourth Proportional to 72,373,807.80, 108,560,711.70 and 18,521,119.80

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Solution

The fourth proportional to 72,373,807.80, 108,560,711.70 and 18,521,119.80 is: 27,781,679.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,373,807.80 : 108,560,711.70 = 18,521,119.80 : x
  2. Step 2: Convert to fraction form
    72,373,807.80/108,560,711.70 = 18,521,119.80/x
  3. Step 3: Cross multiply
    72,373,807.80x = 108,560,711.70 × 18,521,119.80
  4. Step 4: Simplify right side
    72,373,807.80x = 2,010,665,946,968,961.75
  5. Step 5: Solve for x
    x = 2,010,665,946,968,961.75/72,373,807.80
  6. Step 6: Final answer
    x = 27,781,679.70

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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.