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Finding the Fourth Proportional to 66,649.50, 99,977.90 and 19,906.02

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Solution

The fourth proportional to 66,649.50, 99,977.90 and 19,906.02 is: 29,860.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,649.50 : 99,977.90 = 19,906.02 : x
  2. Step 2: Convert to fraction form
    66,649.50/99,977.90 = 19,906.02/x
  3. Step 3: Cross multiply
    66,649.50x = 99,977.90 × 19,906.02
  4. Step 4: Simplify right side
    66,649.50x = 1,990,161,977.43
  5. Step 5: Solve for x
    x = 1,990,161,977.43/66,649.50
  6. Step 6: Final answer
    x = 29,860.12

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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.