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Finding the Fourth Proportional to 66,635.98, 99,924.80 and 19,879.54

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Solution

The fourth proportional to 66,635.98, 99,924.80 and 19,879.54 is: 29,810.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,635.98 : 99,924.80 = 19,879.54 : x
  2. Step 2: Convert to fraction form
    66,635.98/99,924.80 = 19,879.54/x
  3. Step 3: Cross multiply
    66,635.98x = 99,924.80 × 19,879.54
  4. Step 4: Simplify right side
    66,635.98x = 1,986,459,058.59
  5. Step 5: Solve for x
    x = 1,986,459,058.59/66,635.98
  6. Step 6: Final answer
    x = 29,810.61

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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.