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Finding the Fourth Proportional to 66,433.88, 99,651.18 and 19,687.16

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Solution

The fourth proportional to 66,433.88, 99,651.18 and 19,687.16 is: 29,530.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,433.88 : 99,651.18 = 19,687.16 : x
  2. Step 2: Convert to fraction form
    66,433.88/99,651.18 = 19,687.16/x
  3. Step 3: Cross multiply
    66,433.88x = 99,651.18 × 19,687.16
  4. Step 4: Simplify right side
    66,433.88x = 1,961,849,047.80
  5. Step 5: Solve for x
    x = 1,961,849,047.80/66,433.88
  6. Step 6: Final answer
    x = 29,530.85

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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.