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Finding the Fourth Proportional to 79,693.70, 109,977.64 and 47,863.13

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Solution

The fourth proportional to 79,693.70, 109,977.64 and 47,863.13 is: 66,051.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,693.70 : 109,977.64 = 47,863.13 : x
  2. Step 2: Convert to fraction form
    79,693.70/109,977.64 = 47,863.13/x
  3. Step 3: Cross multiply
    79,693.70x = 109,977.64 × 47,863.13
  4. Step 4: Simplify right side
    79,693.70x = 5,263,874,235.70
  5. Step 5: Solve for x
    x = 5,263,874,235.70/79,693.70
  6. Step 6: Final answer
    x = 66,051.32

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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.