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Finding the Fourth Proportional to 71,309,905.20, 106,964,857.80 and 66,491,506.80

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Solution

The fourth proportional to 71,309,905.20, 106,964,857.80 and 66,491,506.80 is: 99,737,260.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,309,905.20 : 106,964,857.80 = 66,491,506.80 : x
  2. Step 2: Convert to fraction form
    71,309,905.20/106,964,857.80 = 66,491,506.80/x
  3. Step 3: Cross multiply
    71,309,905.20x = 106,964,857.80 × 66,491,506.80
  4. Step 4: Simplify right side
    71,309,905.20x = 7,112,254,569,769,733
  5. Step 5: Solve for x
    x = 7,112,254,569,769,733/71,309,905.20
  6. Step 6: Final answer
    x = 99,737,260.20

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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.