Home / 111,208.20-166,812.30-81,756.60

Finding the Fourth Proportional to 111,208.20, 166,812.30 and 81,756.60

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Solution

The fourth proportional to 111,208.20, 166,812.30 and 81,756.60 is: 122,634.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,208.20 : 166,812.30 = 81,756.60 : x
  2. Step 2: Convert to fraction form
    111,208.20/166,812.30 = 81,756.60/x
  3. Step 3: Cross multiply
    111,208.20x = 166,812.30 × 81,756.60
  4. Step 4: Simplify right side
    111,208.20x = 13,638,006,486.18
  5. Step 5: Solve for x
    x = 13,638,006,486.18/111,208.20
  6. Step 6: Final answer
    x = 122,634.90

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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.