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Finding the Fourth Proportional to 111,771.66, 154,207.29 and 75,899.40

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Solution

The fourth proportional to 111,771.66, 154,207.29 and 75,899.40 is: 104,715.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,771.66 : 154,207.29 = 75,899.40 : x
  2. Step 2: Convert to fraction form
    111,771.66/154,207.29 = 75,899.40/x
  3. Step 3: Cross multiply
    111,771.66x = 154,207.29 × 75,899.40
  4. Step 4: Simplify right side
    111,771.66x = 11,704,240,786.63
  5. Step 5: Solve for x
    x = 11,704,240,786.63/111,771.66
  6. Step 6: Final answer
    x = 104,715.64

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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.