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Finding the Fourth Proportional to 139,066.20, 208,599.30 and 75,861.90

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Solution

The fourth proportional to 139,066.20, 208,599.30 and 75,861.90 is: 113,792.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,066.20 : 208,599.30 = 75,861.90 : x
  2. Step 2: Convert to fraction form
    139,066.20/208,599.30 = 75,861.90/x
  3. Step 3: Cross multiply
    139,066.20x = 208,599.30 × 75,861.90
  4. Step 4: Simplify right side
    139,066.20x = 15,824,739,236.67
  5. Step 5: Solve for x
    x = 15,824,739,236.67/139,066.20
  6. Step 6: Final answer
    x = 113,792.85

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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.