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Finding the Fourth Proportional to 121,627.60, 182,052.60 and 86,635.60

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Solution

The fourth proportional to 121,627.60, 182,052.60 and 86,635.60 is: 129,676.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,627.60 : 182,052.60 = 86,635.60 : x
  2. Step 2: Convert to fraction form
    121,627.60/182,052.60 = 86,635.60/x
  3. Step 3: Cross multiply
    121,627.60x = 182,052.60 × 86,635.60
  4. Step 4: Simplify right side
    121,627.60x = 15,772,236,232.56
  5. Step 5: Solve for x
    x = 15,772,236,232.56/121,627.60
  6. Step 6: Final answer
    x = 129,676.46

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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.