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Finding the Fourth Proportional to 68,241,937.80, 102,362,906.70 and 42,413,905.20

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Solution

The fourth proportional to 68,241,937.80, 102,362,906.70 and 42,413,905.20 is: 63,620,857.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,241,937.80 : 102,362,906.70 = 42,413,905.20 : x
  2. Step 2: Convert to fraction form
    68,241,937.80/102,362,906.70 = 42,413,905.20/x
  3. Step 3: Cross multiply
    68,241,937.80x = 102,362,906.70 × 42,413,905.20
  4. Step 4: Simplify right side
    68,241,937.80x = 4,341,610,620,770,245.50
  5. Step 5: Solve for x
    x = 4,341,610,620,770,245.50/68,241,937.80
  6. Step 6: Final answer
    x = 63,620,857.80

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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.