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Finding the Fourth Proportional to 66,415.56, 99,623.16 and 19,672.08

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Solution

The fourth proportional to 66,415.56, 99,623.16 and 19,672.08 is: 29,508.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,415.56 : 99,623.16 = 19,672.08 : x
  2. Step 2: Convert to fraction form
    66,415.56/99,623.16 = 19,672.08/x
  3. Step 3: Cross multiply
    66,415.56x = 99,623.16 × 19,672.08
  4. Step 4: Simplify right side
    66,415.56x = 1,959,794,773.37
  5. Step 5: Solve for x
    x = 1,959,794,773.37/66,415.56
  6. Step 6: Final answer
    x = 29,508.07

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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.