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Finding the Fourth Proportional to 253,103.21, 349,267.42 and 139,919.21

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Solution

The fourth proportional to 253,103.21, 349,267.42 and 139,919.21 is: 193,080.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,103.21 : 349,267.42 = 139,919.21 : x
  2. Step 2: Convert to fraction form
    253,103.21/349,267.42 = 139,919.21/x
  3. Step 3: Cross multiply
    253,103.21x = 349,267.42 × 139,919.21
  4. Step 4: Simplify right side
    253,103.21x = 48,869,221,485.14
  5. Step 5: Solve for x
    x = 48,869,221,485.14/253,103.21
  6. Step 6: Final answer
    x = 193,080.21

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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.