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Finding the Fourth Proportional to 66,419.60, 99,648.60 and 19,673.36

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Solution

The fourth proportional to 66,419.60, 99,648.60 and 19,673.36 is: 29,515.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,419.60 : 99,648.60 = 19,673.36 : x
  2. Step 2: Convert to fraction form
    66,419.60/99,648.60 = 19,673.36/x
  3. Step 3: Cross multiply
    66,419.60x = 99,648.60 × 19,673.36
  4. Step 4: Simplify right side
    66,419.60x = 1,960,422,781.30
  5. Step 5: Solve for x
    x = 1,960,422,781.30/66,419.60
  6. Step 6: Final answer
    x = 29,515.73

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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.