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Finding the Fourth Proportional to 169,855.20, 254,475.60 and 138,520.80

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Solution

The fourth proportional to 169,855.20, 254,475.60 and 138,520.80 is: 207,530.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,855.20 : 254,475.60 = 138,520.80 : x
  2. Step 2: Convert to fraction form
    169,855.20/254,475.60 = 138,520.80/x
  3. Step 3: Cross multiply
    169,855.20x = 254,475.60 × 138,520.80
  4. Step 4: Simplify right side
    169,855.20x = 35,250,163,692.48
  5. Step 5: Solve for x
    x = 35,250,163,692.48/169,855.20
  6. Step 6: Final answer
    x = 207,530.67

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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.