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Finding the Fourth Proportional to 65,419.60, 98,129.40 and 39,175.60

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Solution

The fourth proportional to 65,419.60, 98,129.40 and 39,175.60 is: 58,763.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,419.60 : 98,129.40 = 39,175.60 : x
  2. Step 2: Convert to fraction form
    65,419.60/98,129.40 = 39,175.60/x
  3. Step 3: Cross multiply
    65,419.60x = 98,129.40 × 39,175.60
  4. Step 4: Simplify right side
    65,419.60x = 3,844,278,122.64
  5. Step 5: Solve for x
    x = 3,844,278,122.64/65,419.60
  6. Step 6: Final answer
    x = 58,763.40

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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.