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Finding the Fourth Proportional to 65,720.90, 98,544.90 and 28,274.60

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Solution

The fourth proportional to 65,720.90, 98,544.90 and 28,274.60 is: 42,396.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,720.90 : 98,544.90 = 28,274.60 : x
  2. Step 2: Convert to fraction form
    65,720.90/98,544.90 = 28,274.60/x
  3. Step 3: Cross multiply
    65,720.90x = 98,544.90 × 28,274.60
  4. Step 4: Simplify right side
    65,720.90x = 2,786,317,629.54
  5. Step 5: Solve for x
    x = 2,786,317,629.54/65,720.90
  6. Step 6: Final answer
    x = 42,396.22

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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.