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Finding the Fourth Proportional to 111,178.62, 153,428.31 and 60,874.38

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Solution

The fourth proportional to 111,178.62, 153,428.31 and 60,874.38 is: 84,007.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,178.62 : 153,428.31 = 60,874.38 : x
  2. Step 2: Convert to fraction form
    111,178.62/153,428.31 = 60,874.38/x
  3. Step 3: Cross multiply
    111,178.62x = 153,428.31 × 60,874.38
  4. Step 4: Simplify right side
    111,178.62x = 9,339,853,245.70
  5. Step 5: Solve for x
    x = 9,339,853,245.70/111,178.62
  6. Step 6: Final answer
    x = 84,007.64

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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.