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Finding the Fourth Proportional to 68,616,665.90, 102,830,520.45 and 45,521,945.90

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Solution

The fourth proportional to 68,616,665.90, 102,830,520.45 and 45,521,945.90 is: 68,220,239.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,616,665.90 : 102,830,520.45 = 45,521,945.90 : x
  2. Step 2: Convert to fraction form
    68,616,665.90/102,830,520.45 = 45,521,945.90/x
  3. Step 3: Cross multiply
    68,616,665.90x = 102,830,520.45 × 45,521,945.90
  4. Step 4: Simplify right side
    68,616,665.90x = 4,681,045,388,793,744
  5. Step 5: Solve for x
    x = 4,681,045,388,793,744/68,616,665.90
  6. Step 6: Final answer
    x = 68,220,239.61

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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.