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Finding the Fourth Proportional to 108,713.20, 162,916.20 and 80,412.40

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Solution

The fourth proportional to 108,713.20, 162,916.20 and 80,412.40 is: 120,504.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,713.20 : 162,916.20 = 80,412.40 : x
  2. Step 2: Convert to fraction form
    108,713.20/162,916.20 = 80,412.40/x
  3. Step 3: Cross multiply
    108,713.20x = 162,916.20 × 80,412.40
  4. Step 4: Simplify right side
    108,713.20x = 13,100,482,640.88
  5. Step 5: Solve for x
    x = 13,100,482,640.88/108,713.20
  6. Step 6: Final answer
    x = 120,504.99

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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.