Home / 90,830.20-136,475.70-80,692.60

Finding the Fourth Proportional to 90,830.20, 136,475.70 and 80,692.60

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Solution

The fourth proportional to 90,830.20, 136,475.70 and 80,692.60 is: 121,243.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,830.20 : 136,475.70 = 80,692.60 : x
  2. Step 2: Convert to fraction form
    90,830.20/136,475.70 = 80,692.60/x
  3. Step 3: Cross multiply
    90,830.20x = 136,475.70 × 80,692.60
  4. Step 4: Simplify right side
    90,830.20x = 11,012,579,069.82
  5. Step 5: Solve for x
    x = 11,012,579,069.82/90,830.20
  6. Step 6: Final answer
    x = 121,243.58

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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.