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Finding the Fourth Proportional to 108,422.80, 162,461.40 and 80,429.20

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Solution

The fourth proportional to 108,422.80, 162,461.40 and 80,429.20 is: 120,515.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,422.80 : 162,461.40 = 80,429.20 : x
  2. Step 2: Convert to fraction form
    108,422.80/162,461.40 = 80,429.20/x
  3. Step 3: Cross multiply
    108,422.80x = 162,461.40 × 80,429.20
  4. Step 4: Simplify right side
    108,422.80x = 13,066,640,432.88
  5. Step 5: Solve for x
    x = 13,066,640,432.88/108,422.80
  6. Step 6: Final answer
    x = 120,515.62

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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.