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Finding the Fourth Proportional to 66,445.28, 99,650.94 and 19,687.22

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Solution

The fourth proportional to 66,445.28, 99,650.94 and 19,687.22 is: 29,525.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,445.28 : 99,650.94 = 19,687.22 : x
  2. Step 2: Convert to fraction form
    66,445.28/99,650.94 = 19,687.22/x
  3. Step 3: Cross multiply
    66,445.28x = 99,650.94 × 19,687.22
  4. Step 4: Simplify right side
    66,445.28x = 1,961,849,978.99
  5. Step 5: Solve for x
    x = 1,961,849,978.99/66,445.28
  6. Step 6: Final answer
    x = 29,525.80

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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.