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Finding the Fourth Proportional to 85,157.69, 117,517.64 and 49,368.49

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Solution

The fourth proportional to 85,157.69, 117,517.64 and 49,368.49 is: 68,128.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,157.69 : 117,517.64 = 49,368.49 : x
  2. Step 2: Convert to fraction form
    85,157.69/117,517.64 = 49,368.49/x
  3. Step 3: Cross multiply
    85,157.69x = 117,517.64 × 49,368.49
  4. Step 4: Simplify right side
    85,157.69x = 5,801,667,894.53
  5. Step 5: Solve for x
    x = 5,801,667,894.53/85,157.69
  6. Step 6: Final answer
    x = 68,128.53

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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.