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Finding the Fourth Proportional to 279,245.60, 418,657.44 and 139,103.36

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Solution

The fourth proportional to 279,245.60, 418,657.44 and 139,103.36 is: 208,549.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,245.60 : 418,657.44 = 139,103.36 : x
  2. Step 2: Convert to fraction form
    279,245.60/418,657.44 = 139,103.36/x
  3. Step 3: Cross multiply
    279,245.60x = 418,657.44 × 139,103.36
  4. Step 4: Simplify right side
    279,245.60x = 58,236,656,593.00
  5. Step 5: Solve for x
    x = 58,236,656,593.00/279,245.60
  6. Step 6: Final answer
    x = 208,549.95

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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.