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Finding the Fourth Proportional to 108,741.70, 163,112.55 and 100,212.40

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Solution

The fourth proportional to 108,741.70, 163,112.55 and 100,212.40 is: 150,318.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,741.70 : 163,112.55 = 100,212.40 : x
  2. Step 2: Convert to fraction form
    108,741.70/163,112.55 = 100,212.40/x
  3. Step 3: Cross multiply
    108,741.70x = 163,112.55 × 100,212.40
  4. Step 4: Simplify right side
    108,741.70x = 16,345,900,105.62
  5. Step 5: Solve for x
    x = 16,345,900,105.62/108,741.70
  6. Step 6: Final answer
    x = 150,318.60

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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.