Home / 78,701.21-117,965.91-38,747.69

Finding the Fourth Proportional to 78,701.21, 117,965.91 and 38,747.69

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Solution

The fourth proportional to 78,701.21, 117,965.91 and 38,747.69 is: 58,079.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,701.21 : 117,965.91 = 38,747.69 : x
  2. Step 2: Convert to fraction form
    78,701.21/117,965.91 = 38,747.69/x
  3. Step 3: Cross multiply
    78,701.21x = 117,965.91 × 38,747.69
  4. Step 4: Simplify right side
    78,701.21x = 4,570,906,511.25
  5. Step 5: Solve for x
    x = 4,570,906,511.25/78,701.21
  6. Step 6: Final answer
    x = 58,079.24

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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.