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Finding the Fourth Proportional to 91,716.80, 137,344.80 and 73,284.80

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Solution

The fourth proportional to 91,716.80, 137,344.80 and 73,284.80 is: 109,743.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,716.80 : 137,344.80 = 73,284.80 : x
  2. Step 2: Convert to fraction form
    91,716.80/137,344.80 = 73,284.80/x
  3. Step 3: Cross multiply
    91,716.80x = 137,344.80 × 73,284.80
  4. Step 4: Simplify right side
    91,716.80x = 10,065,286,199.04
  5. Step 5: Solve for x
    x = 10,065,286,199.04/91,716.80
  6. Step 6: Final answer
    x = 109,743.10

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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.