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Finding the Fourth Proportional to 108,404.80, 162,434.40 and 80,411.20

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Solution

The fourth proportional to 108,404.80, 162,434.40 and 80,411.20 is: 120,488.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,404.80 : 162,434.40 = 80,411.20 : x
  2. Step 2: Convert to fraction form
    108,404.80/162,434.40 = 80,411.20/x
  3. Step 3: Cross multiply
    108,404.80x = 162,434.40 × 80,411.20
  4. Step 4: Simplify right side
    108,404.80x = 13,061,545,025.28
  5. Step 5: Solve for x
    x = 13,061,545,025.28/108,404.80
  6. Step 6: Final answer
    x = 120,488.62

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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.