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Finding the Fourth Proportional to 111,885.21, 154,401.84 and 61,584.21

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Solution

The fourth proportional to 111,885.21, 154,401.84 and 61,584.21 is: 84,986.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,885.21 : 154,401.84 = 61,584.21 : x
  2. Step 2: Convert to fraction form
    111,885.21/154,401.84 = 61,584.21/x
  3. Step 3: Cross multiply
    111,885.21x = 154,401.84 × 61,584.21
  4. Step 4: Simplify right side
    111,885.21x = 9,508,715,338.95
  5. Step 5: Solve for x
    x = 9,508,715,338.95/111,885.21
  6. Step 6: Final answer
    x = 84,986.35

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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.