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Finding the Fourth Proportional to 66,561,640.90, 99,795,222.15 and 30,187,456.90

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Solution

The fourth proportional to 66,561,640.90, 99,795,222.15 and 30,187,456.90 is: 45,259,761.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,561,640.90 : 99,795,222.15 = 30,187,456.90 : x
  2. Step 2: Convert to fraction form
    66,561,640.90/99,795,222.15 = 30,187,456.90/x
  3. Step 3: Cross multiply
    66,561,640.90x = 99,795,222.15 × 30,187,456.90
  4. Step 4: Simplify right side
    66,561,640.90x = 3,012,563,967,479,050.50
  5. Step 5: Solve for x
    x = 3,012,563,967,479,050.50/66,561,640.90
  6. Step 6: Final answer
    x = 45,259,761.13

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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.