Home / 84,198.42-116,333.28-66,428.64

Finding the Fourth Proportional to 84,198.42, 116,333.28 and 66,428.64

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Solution

The fourth proportional to 84,198.42, 116,333.28 and 66,428.64 is: 91,781.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,198.42 : 116,333.28 = 66,428.64 : x
  2. Step 2: Convert to fraction form
    84,198.42/116,333.28 = 66,428.64/x
  3. Step 3: Cross multiply
    84,198.42x = 116,333.28 × 66,428.64
  4. Step 4: Simplify right side
    84,198.42x = 7,727,861,577.14
  5. Step 5: Solve for x
    x = 7,727,861,577.14/84,198.42
  6. Step 6: Final answer
    x = 91,781.55

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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.