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Finding the Fourth Proportional to 253,103.71, 349,268.12 and 139,919.71

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Solution

The fourth proportional to 253,103.71, 349,268.12 and 139,919.71 is: 193,080.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,103.71 : 349,268.12 = 139,919.71 : x
  2. Step 2: Convert to fraction form
    253,103.71/349,268.12 = 139,919.71/x
  3. Step 3: Cross multiply
    253,103.71x = 349,268.12 × 139,919.71
  4. Step 4: Simplify right side
    253,103.71x = 48,869,491,616.71
  5. Step 5: Solve for x
    x = 48,869,491,616.71/253,103.71
  6. Step 6: Final answer
    x = 193,080.90

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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.