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Finding the Fourth Proportional to 66,354.64, 99,531.96 and 19,603.87

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Solution

The fourth proportional to 66,354.64, 99,531.96 and 19,603.87 is: 29,405.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,354.64 : 99,531.96 = 19,603.87 : x
  2. Step 2: Convert to fraction form
    66,354.64/99,531.96 = 19,603.87/x
  3. Step 3: Cross multiply
    66,354.64x = 99,531.96 × 19,603.87
  4. Step 4: Simplify right side
    66,354.64x = 1,951,211,107.03
  5. Step 5: Solve for x
    x = 1,951,211,107.03/66,354.64
  6. Step 6: Final answer
    x = 29,405.80

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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.