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Finding the Fourth Proportional to 147,031.20, 220,692.60 and 72,235.80

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Solution

The fourth proportional to 147,031.20, 220,692.60 and 72,235.80 is: 108,425.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,031.20 : 220,692.60 = 72,235.80 : x
  2. Step 2: Convert to fraction form
    147,031.20/220,692.60 = 72,235.80/x
  3. Step 3: Cross multiply
    147,031.20x = 220,692.60 × 72,235.80
  4. Step 4: Simplify right side
    147,031.20x = 15,941,906,515.08
  5. Step 5: Solve for x
    x = 15,941,906,515.08/147,031.20
  6. Step 6: Final answer
    x = 108,425.33

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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.