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Finding the Fourth Proportional to 68,019,812.80, 102,136,007.40 and 39,321,998.80

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Solution

The fourth proportional to 68,019,812.80, 102,136,007.40 and 39,321,998.80 is: 59,044,443.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,019,812.80 : 102,136,007.40 = 39,321,998.80 : x
  2. Step 2: Convert to fraction form
    68,019,812.80/102,136,007.40 = 39,321,998.80/x
  3. Step 3: Cross multiply
    68,019,812.80x = 102,136,007.40 × 39,321,998.80
  4. Step 4: Simplify right side
    68,019,812.80x = 4,016,191,960,419,591
  5. Step 5: Solve for x
    x = 4,016,191,960,419,591/68,019,812.80
  6. Step 6: Final answer
    x = 59,044,443.01

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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.