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Finding the Fourth Proportional to 79,468.53, 109,628.69 and 57,912.06

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Solution

The fourth proportional to 79,468.53, 109,628.69 and 57,912.06 is: 79,891.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,468.53 : 109,628.69 = 57,912.06 : x
  2. Step 2: Convert to fraction form
    79,468.53/109,628.69 = 57,912.06/x
  3. Step 3: Cross multiply
    79,468.53x = 109,628.69 × 57,912.06
  4. Step 4: Simplify right side
    79,468.53x = 6,348,822,983.44
  5. Step 5: Solve for x
    x = 6,348,822,983.44/79,468.53
  6. Step 6: Final answer
    x = 79,891.03

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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.