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Finding the Fourth Proportional to 81,184.64, 111,962.02 and 67,617.72

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Solution

The fourth proportional to 81,184.64, 111,962.02 and 67,617.72 is: 93,251.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,184.64 : 111,962.02 = 67,617.72 : x
  2. Step 2: Convert to fraction form
    81,184.64/111,962.02 = 67,617.72/x
  3. Step 3: Cross multiply
    81,184.64x = 111,962.02 × 67,617.72
  4. Step 4: Simplify right side
    81,184.64x = 7,570,616,518.99
  5. Step 5: Solve for x
    x = 7,570,616,518.99/81,184.64
  6. Step 6: Final answer
    x = 93,251.83

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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.