Home / 128,692.20-192,948.30-76,074.60

Finding the Fourth Proportional to 128,692.20, 192,948.30 and 76,074.60

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Solution

The fourth proportional to 128,692.20, 192,948.30 and 76,074.60 is: 114,058.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,692.20 : 192,948.30 = 76,074.60 : x
  2. Step 2: Convert to fraction form
    128,692.20/192,948.30 = 76,074.60/x
  3. Step 3: Cross multiply
    128,692.20x = 192,948.30 × 76,074.60
  4. Step 4: Simplify right side
    128,692.20x = 14,678,464,743.18
  5. Step 5: Solve for x
    x = 14,678,464,743.18/128,692.20
  6. Step 6: Final answer
    x = 114,058.70

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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.