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Finding the Fourth Proportional to 111,641.88, 154,022.16 and 63,869.64

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Solution

The fourth proportional to 111,641.88, 154,022.16 and 63,869.64 is: 88,115.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,641.88 : 154,022.16 = 63,869.64 : x
  2. Step 2: Convert to fraction form
    111,641.88/154,022.16 = 63,869.64/x
  3. Step 3: Cross multiply
    111,641.88x = 154,022.16 × 63,869.64
  4. Step 4: Simplify right side
    111,641.88x = 9,837,339,911.22
  5. Step 5: Solve for x
    x = 9,837,339,911.22/111,641.88
  6. Step 6: Final answer
    x = 88,115.14

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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.