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Finding the Fourth Proportional to 139,988.53, 193,200.57 and 79,568.25

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Solution

The fourth proportional to 139,988.53, 193,200.57 and 79,568.25 is: 109,813.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,988.53 : 193,200.57 = 79,568.25 : x
  2. Step 2: Convert to fraction form
    139,988.53/193,200.57 = 79,568.25/x
  3. Step 3: Cross multiply
    139,988.53x = 193,200.57 × 79,568.25
  4. Step 4: Simplify right side
    139,988.53x = 15,372,631,253.90
  5. Step 5: Solve for x
    x = 15,372,631,253.90/139,988.53
  6. Step 6: Final answer
    x = 109,813.51

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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.