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Finding the Fourth Proportional to 133,057.68, 183,615 and 79,315

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Solution

The fourth proportional to 133,057.68, 183,615 and 79,315 is: 109,451.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,057.68 : 183,615 = 79,315 : x
  2. Step 2: Convert to fraction form
    133,057.68/183,615 = 79,315/x
  3. Step 3: Cross multiply
    133,057.68x = 183,615 × 79,315
  4. Step 4: Simplify right side
    133,057.68x = 14,563,423,725
  5. Step 5: Solve for x
    x = 14,563,423,725/133,057.68
  6. Step 6: Final answer
    x = 109,451.96

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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.