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Finding the Fourth Proportional to 91,364.56, 125,986.12 and 71,185.68

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Solution

The fourth proportional to 91,364.56, 125,986.12 and 71,185.68 is: 98,160.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,364.56 : 125,986.12 = 71,185.68 : x
  2. Step 2: Convert to fraction form
    91,364.56/125,986.12 = 71,185.68/x
  3. Step 3: Cross multiply
    91,364.56x = 125,986.12 × 71,185.68
  4. Step 4: Simplify right side
    91,364.56x = 8,968,407,622.76
  5. Step 5: Solve for x
    x = 8,968,407,622.76/91,364.56
  6. Step 6: Final answer
    x = 98,160.68

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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.