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Finding the Fourth Proportional to 81,662,446.80, 122,493,670.20 and 70,576,981.20

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Solution

The fourth proportional to 81,662,446.80, 122,493,670.20 and 70,576,981.20 is: 105,865,471.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,662,446.80 : 122,493,670.20 = 70,576,981.20 : x
  2. Step 2: Convert to fraction form
    81,662,446.80/122,493,670.20 = 70,576,981.20/x
  3. Step 3: Cross multiply
    81,662,446.80x = 122,493,670.20 × 70,576,981.20
  4. Step 4: Simplify right side
    81,662,446.80x = 8,645,233,458,824,401
  5. Step 5: Solve for x
    x = 8,645,233,458,824,401/81,662,446.80
  6. Step 6: Final answer
    x = 105,865,471.80

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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.