Home / 78,015.39-117,026.43-30,640.75

Finding the Fourth Proportional to 78,015.39, 117,026.43 and 30,640.75

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Solution

The fourth proportional to 78,015.39, 117,026.43 and 30,640.75 is: 45,962.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,015.39 : 117,026.43 = 30,640.75 : x
  2. Step 2: Convert to fraction form
    78,015.39/117,026.43 = 30,640.75/x
  3. Step 3: Cross multiply
    78,015.39x = 117,026.43 × 30,640.75
  4. Step 4: Simplify right side
    78,015.39x = 3,585,777,177.55
  5. Step 5: Solve for x
    x = 3,585,777,177.55/78,015.39
  6. Step 6: Final answer
    x = 45,962.44

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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.