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Finding the Fourth Proportional to 108,749.20, 163,123.80 and 100,219.90

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Solution

The fourth proportional to 108,749.20, 163,123.80 and 100,219.90 is: 150,329.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,749.20 : 163,123.80 = 100,219.90 : x
  2. Step 2: Convert to fraction form
    108,749.20/163,123.80 = 100,219.90/x
  3. Step 3: Cross multiply
    108,749.20x = 163,123.80 × 100,219.90
  4. Step 4: Simplify right side
    108,749.20x = 16,348,250,923.62
  5. Step 5: Solve for x
    x = 16,348,250,923.62/108,749.20
  6. Step 6: Final answer
    x = 150,329.85

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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.