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Finding the Fourth Proportional to 79,717.82, 109,890.38 and 65,546.06

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Solution

The fourth proportional to 79,717.82, 109,890.38 and 65,546.06 is: 90,354.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,717.82 : 109,890.38 = 65,546.06 : x
  2. Step 2: Convert to fraction form
    79,717.82/109,890.38 = 65,546.06/x
  3. Step 3: Cross multiply
    79,717.82x = 109,890.38 × 65,546.06
  4. Step 4: Simplify right side
    79,717.82x = 7,202,881,440.90
  5. Step 5: Solve for x
    x = 7,202,881,440.90/79,717.82
  6. Step 6: Final answer
    x = 90,354.72

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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.