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Finding the Fourth Proportional to 66,381.36, 99,591.48 and 19,635.48

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Solution

The fourth proportional to 66,381.36, 99,591.48 and 19,635.48 is: 29,458.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,381.36 : 99,591.48 = 19,635.48 : x
  2. Step 2: Convert to fraction form
    66,381.36/99,591.48 = 19,635.48/x
  3. Step 3: Cross multiply
    66,381.36x = 99,591.48 × 19,635.48
  4. Step 4: Simplify right side
    66,381.36x = 1,955,526,513.71
  5. Step 5: Solve for x
    x = 1,955,526,513.71/66,381.36
  6. Step 6: Final answer
    x = 29,458.97

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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.