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Finding the Fourth Proportional to 68,141,381.80, 102,212,072.70 and 40,931,602.60

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Solution

The fourth proportional to 68,141,381.80, 102,212,072.70 and 40,931,602.60 is: 61,397,403.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,141,381.80 : 102,212,072.70 = 40,931,602.60 : x
  2. Step 2: Convert to fraction form
    68,141,381.80/102,212,072.70 = 40,931,602.60/x
  3. Step 3: Cross multiply
    68,141,381.80x = 102,212,072.70 × 40,931,602.60
  4. Step 4: Simplify right side
    68,141,381.80x = 4,183,703,940,678,709.50
  5. Step 5: Solve for x
    x = 4,183,703,940,678,709.50/68,141,381.80
  6. Step 6: Final answer
    x = 61,397,403.90

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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.