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Finding the Fourth Proportional to 108,503.20, 162,495.60 and 66,512.80

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Solution

The fourth proportional to 108,503.20, 162,495.60 and 66,512.80 is: 99,610.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,503.20 : 162,495.60 = 66,512.80 : x
  2. Step 2: Convert to fraction form
    108,503.20/162,495.60 = 66,512.80/x
  3. Step 3: Cross multiply
    108,503.20x = 162,495.60 × 66,512.80
  4. Step 4: Simplify right side
    108,503.20x = 10,808,037,343.68
  5. Step 5: Solve for x
    x = 10,808,037,343.68/108,503.20
  6. Step 6: Final answer
    x = 99,610.31

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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.