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Finding the Fourth Proportional to 115,511.60, 173,137.80 and 65,615.60

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Solution

The fourth proportional to 115,511.60, 173,137.80 and 65,615.60 is: 98,349.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,511.60 : 173,137.80 = 65,615.60 : x
  2. Step 2: Convert to fraction form
    115,511.60/173,137.80 = 65,615.60/x
  3. Step 3: Cross multiply
    115,511.60x = 173,137.80 × 65,615.60
  4. Step 4: Simplify right side
    115,511.60x = 11,360,540,629.68
  5. Step 5: Solve for x
    x = 11,360,540,629.68/115,511.60
  6. Step 6: Final answer
    x = 98,349.78

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1.5x scale

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.