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Finding the Fourth Proportional to 99,512,999.80, 149,269,499.70 and 56,466,278.80

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Solution

The fourth proportional to 99,512,999.80, 149,269,499.70 and 56,466,278.80 is: 84,699,418.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,512,999.80 : 149,269,499.70 = 56,466,278.80 : x
  2. Step 2: Convert to fraction form
    99,512,999.80/149,269,499.70 = 56,466,278.80/x
  3. Step 3: Cross multiply
    99,512,999.80x = 149,269,499.70 × 56,466,278.80
  4. Step 4: Simplify right side
    99,512,999.80x = 8,428,693,186,396,715
  5. Step 5: Solve for x
    x = 8,428,693,186,396,715/99,512,999.80
  6. Step 6: Final answer
    x = 84,699,418.20

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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.