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Finding the Fourth Proportional to 66,092.80, 99,129.60 and 19,340.80

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Solution

The fourth proportional to 66,092.80, 99,129.60 and 19,340.80 is: 29,008.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,092.80 : 99,129.60 = 19,340.80 : x
  2. Step 2: Convert to fraction form
    66,092.80/99,129.60 = 19,340.80/x
  3. Step 3: Cross multiply
    66,092.80x = 99,129.60 × 19,340.80
  4. Step 4: Simplify right side
    66,092.80x = 1,917,245,767.68
  5. Step 5: Solve for x
    x = 1,917,245,767.68/66,092.80
  6. Step 6: Final answer
    x = 29,008.39

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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.