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Finding the Fourth Proportional to 271,810.80, 407,716.20 and 72,130.80

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Solution

The fourth proportional to 271,810.80, 407,716.20 and 72,130.80 is: 108,196.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,810.80 : 407,716.20 = 72,130.80 : x
  2. Step 2: Convert to fraction form
    271,810.80/407,716.20 = 72,130.80/x
  3. Step 3: Cross multiply
    271,810.80x = 407,716.20 × 72,130.80
  4. Step 4: Simplify right side
    271,810.80x = 29,408,895,678.96
  5. Step 5: Solve for x
    x = 29,408,895,678.96/271,810.80
  6. Step 6: Final answer
    x = 108,196.20

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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.