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Finding the Fourth Proportional to 108,612.80, 162,919.20 and 73,361.60

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Solution

The fourth proportional to 108,612.80, 162,919.20 and 73,361.60 is: 110,042.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,612.80 : 162,919.20 = 73,361.60 : x
  2. Step 2: Convert to fraction form
    108,612.80/162,919.20 = 73,361.60/x
  3. Step 3: Cross multiply
    108,612.80x = 162,919.20 × 73,361.60
  4. Step 4: Simplify right side
    108,612.80x = 11,952,013,182.72
  5. Step 5: Solve for x
    x = 11,952,013,182.72/108,612.80
  6. Step 6: Final answer
    x = 110,042.40

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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.