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Finding the Fourth Proportional to 111,318.93, 167,060.52 and 81,816.30

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Solution

The fourth proportional to 111,318.93, 167,060.52 and 81,816.30 is: 122,784.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,318.93 : 167,060.52 = 81,816.30 : x
  2. Step 2: Convert to fraction form
    111,318.93/167,060.52 = 81,816.30/x
  3. Step 3: Cross multiply
    111,318.93x = 167,060.52 × 81,816.30
  4. Step 4: Simplify right side
    111,318.93x = 13,668,273,622.48
  5. Step 5: Solve for x
    x = 13,668,273,622.48/111,318.93
  6. Step 6: Final answer
    x = 122,784.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.