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Finding the Fourth Proportional to 91,139.58, 125,768.34 and 67,257.54

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Solution

The fourth proportional to 91,139.58, 125,768.34 and 67,257.54 is: 92,812.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,139.58 : 125,768.34 = 67,257.54 : x
  2. Step 2: Convert to fraction form
    91,139.58/125,768.34 = 67,257.54/x
  3. Step 3: Cross multiply
    91,139.58x = 125,768.34 × 67,257.54
  4. Step 4: Simplify right side
    91,139.58x = 8,458,869,158.28
  5. Step 5: Solve for x
    x = 8,458,869,158.28/91,139.58
  6. Step 6: Final answer
    x = 92,812.25

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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.