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Finding the Fourth Proportional to 91,605.44, 137,301.60 and 74,993.60

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Solution

The fourth proportional to 91,605.44, 137,301.60 and 74,993.60 is: 112,403.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,605.44 : 137,301.60 = 74,993.60 : x
  2. Step 2: Convert to fraction form
    91,605.44/137,301.60 = 74,993.60/x
  3. Step 3: Cross multiply
    91,605.44x = 137,301.60 × 74,993.60
  4. Step 4: Simplify right side
    91,605.44x = 10,296,741,269.76
  5. Step 5: Solve for x
    x = 10,296,741,269.76/91,605.44
  6. Step 6: Final answer
    x = 112,403.16

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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.