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Finding the Fourth Proportional to 108,640.10, 162,960.15 and 91,144.10

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Solution

The fourth proportional to 108,640.10, 162,960.15 and 91,144.10 is: 136,716.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,640.10 : 162,960.15 = 91,144.10 : x
  2. Step 2: Convert to fraction form
    108,640.10/162,960.15 = 91,144.10/x
  3. Step 3: Cross multiply
    108,640.10x = 162,960.15 × 91,144.10
  4. Step 4: Simplify right side
    108,640.10x = 14,852,856,207.62
  5. Step 5: Solve for x
    x = 14,852,856,207.62/108,640.10
  6. Step 6: Final answer
    x = 136,716.15

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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.