Home / 108,029.20-162,189.60-85,867.60

Finding the Fourth Proportional to 108,029.20, 162,189.60 and 85,867.60

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Solution

The fourth proportional to 108,029.20, 162,189.60 and 85,867.60 is: 128,917.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,029.20 : 162,189.60 = 85,867.60 : x
  2. Step 2: Convert to fraction form
    108,029.20/162,189.60 = 85,867.60/x
  3. Step 3: Cross multiply
    108,029.20x = 162,189.60 × 85,867.60
  4. Step 4: Simplify right side
    108,029.20x = 13,926,831,696.96
  5. Step 5: Solve for x
    x = 13,926,831,696.96/108,029.20
  6. Step 6: Final answer
    x = 128,917.29

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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.