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Finding the Fourth Proportional to 268,914, 403,419.04 and 91,411.68

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Solution

The fourth proportional to 268,914, 403,419.04 and 91,411.68 is: 137,133.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,914 : 403,419.04 = 91,411.68 : x
  2. Step 2: Convert to fraction form
    268,914/403,419.04 = 91,411.68/x
  3. Step 3: Cross multiply
    268,914x = 403,419.04 × 91,411.68
  4. Step 4: Simplify right side
    268,914x = 36,877,212,190.39
  5. Step 5: Solve for x
    x = 36,877,212,190.39/268,914
  6. Step 6: Final answer
    x = 137,133.85

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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.