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Finding the Fourth Proportional to 91,297.07, 136,759.64 and 74,489.98

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Solution

The fourth proportional to 91,297.07, 136,759.64 and 74,489.98 is: 111,583.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,297.07 : 136,759.64 = 74,489.98 : x
  2. Step 2: Convert to fraction form
    91,297.07/136,759.64 = 74,489.98/x
  3. Step 3: Cross multiply
    91,297.07x = 136,759.64 × 74,489.98
  4. Step 4: Simplify right side
    91,297.07x = 10,187,222,809.49
  5. Step 5: Solve for x
    x = 10,187,222,809.49/91,297.07
  6. Step 6: Final answer
    x = 111,583.23

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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.