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Finding the Fourth Proportional to 111,269.80, 166,904.70 and 81,526.60

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Solution

The fourth proportional to 111,269.80, 166,904.70 and 81,526.60 is: 122,289.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,269.80 : 166,904.70 = 81,526.60 : x
  2. Step 2: Convert to fraction form
    111,269.80/166,904.70 = 81,526.60/x
  3. Step 3: Cross multiply
    111,269.80x = 166,904.70 × 81,526.60
  4. Step 4: Simplify right side
    111,269.80x = 13,607,172,715.02
  5. Step 5: Solve for x
    x = 13,607,172,715.02/111,269.80
  6. Step 6: Final answer
    x = 122,289.90

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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.