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Finding the Fourth Proportional to 79,687.56, 109,966.68 and 45,701.76

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Solution

The fourth proportional to 79,687.56, 109,966.68 and 45,701.76 is: 63,067.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,687.56 : 109,966.68 = 45,701.76 : x
  2. Step 2: Convert to fraction form
    79,687.56/109,966.68 = 45,701.76/x
  3. Step 3: Cross multiply
    79,687.56x = 109,966.68 × 45,701.76
  4. Step 4: Simplify right side
    79,687.56x = 5,025,670,817.36
  5. Step 5: Solve for x
    x = 5,025,670,817.36/79,687.56
  6. Step 6: Final answer
    x = 63,067.19

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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.