Home / 109,918.62-164,822.49-78,310.62

Finding the Fourth Proportional to 109,918.62, 164,822.49 and 78,310.62

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Solution

The fourth proportional to 109,918.62, 164,822.49 and 78,310.62 is: 117,426.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,918.62 : 164,822.49 = 78,310.62 : x
  2. Step 2: Convert to fraction form
    109,918.62/164,822.49 = 78,310.62/x
  3. Step 3: Cross multiply
    109,918.62x = 164,822.49 × 78,310.62
  4. Step 4: Simplify right side
    109,918.62x = 12,907,351,381.84
  5. Step 5: Solve for x
    x = 12,907,351,381.84/109,918.62
  6. Step 6: Final answer
    x = 117,426.43

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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.