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Finding the Fourth Proportional to 68,945,343.84, 103,386,219.84 and 20,405,841.12

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Solution

The fourth proportional to 68,945,343.84, 103,386,219.84 and 20,405,841.12 is: 30,599,351.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,945,343.84 : 103,386,219.84 = 20,405,841.12 : x
  2. Step 2: Convert to fraction form
    68,945,343.84/103,386,219.84 = 20,405,841.12/x
  3. Step 3: Cross multiply
    68,945,343.84x = 103,386,219.84 × 20,405,841.12
  4. Step 4: Simplify right side
    68,945,343.84x = 2,109,682,776,052,432
  5. Step 5: Solve for x
    x = 2,109,682,776,052,432/68,945,343.84
  6. Step 6: Final answer
    x = 30,599,351.00

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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.