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Finding the Fourth Proportional to 86,874.60, 119,940.84 and 66,692.88

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Solution

The fourth proportional to 86,874.60, 119,940.84 and 66,692.88 is: 92,077.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,874.60 : 119,940.84 = 66,692.88 : x
  2. Step 2: Convert to fraction form
    86,874.60/119,940.84 = 66,692.88/x
  3. Step 3: Cross multiply
    86,874.60x = 119,940.84 × 66,692.88
  4. Step 4: Simplify right side
    86,874.60x = 7,999,200,049.22
  5. Step 5: Solve for x
    x = 7,999,200,049.22/86,874.60
  6. Step 6: Final answer
    x = 92,077.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.